baf2 solubility in water baf2 solubility in water

Its simply the equilibrium constant (Keq) for an ionic substance dissolving in water. Calculate its Ksp. Sodium chloride contains Na, which is almost always soluble according to rule 1, and Cl, which is usually soluble according to rule 3. Rule 4 says that silvers (Ag) are frequently insoluble, but rule 3 says that chlorates (Cl) are soluble. Learn more about Stack Overflow the company, and our products. How can we prove that the supernatural or paranormal doesn't exist? Although it is an ionic compou. While we can calculate the solubility by measuring each substance and following an equation, the solubility rules allow us to determine the solubility of a substance before you attempt to create it. Question: Is calcium oxidean ionic or covalent bond ? Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today ! Preparing for the AP Chemistry test? [9] Under standard conditions it adopts the fluorite structure and at high pressure the PbCl2 structure. 1. Hey there! Use Coupon: CART20 and get 20% off on all online Study Material, Complete Your Registration (Step 2 of 2 ), Sit and relax as our customer representative will contact you within 1 business day. Very subject to thermal shock 2. The solubility-product constant for BaF2 is 1.7 x 10^-6 at 25 C. Is BaF2 ( Barium fluoride ) Soluble or Insoluble in water ? Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. National Institutes of Health. Which of these salts will be more soluble in an acidic solution than in water? The concentration of fluoride ions in the solution is as follows: [F ]=2s. Ksp for BaF2=2.45 x10^-5. It is $\ce{CaF2}$. Lead two fluoride forms lead two plus ions and fluoride anions in a one to two mole ratio. Knowing and following the solubility rules is the best way to predict the outcome of any given solution. Hydroxide salts of Group I elements are soluble. Exceptions: Ba2+, Ca2+, Pb2+, Ag+, Sr2+- most hydroxide salts are only slightly soluble. Answer: B2 2-is a Diamagnetic What is Paramagnetic and Diamagnetic ? hbspt.cta._relativeUrls=true;hbspt.cta.load(360031, '21006efe-96ea-47ea-9553-204221f7f333', {"useNewLoader":"true","region":"na1"}); Carrie holds a Bachelors in Writing, Literature, and Publishing from Emerson College, and is currently pursuing an MFA. Enter a Melbet promo code and get a generous bonus, An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. 1 What is the molar solubility of BaF2 in water? Short story taking place on a toroidal planet or moon involving flying. Answer = SiCl2F2 is Polar What is polarand non-polar? Helmenstine, Todd. Generally, solutes are soluble in solvents that are most similar to them molecularly. Whether or not a substance is soluble, and to what degree, depends on a variety of factors. For help with net ionic equations see https://youtu.be/PXRH_IrN11Y .If you need to know how to balance chemical reactions, see my complete tutorial on balancing all types of chemical equations:Balancing Equations in 5 Easy Steps: https://youtu.be/zmdxMlb88FsMore Practice Balancing: https://youtu.be/Qci7hiBy7EQDrawing/writing done in InkScape. I transcribed for you this time but might be less generous in the future. [10] Like CaF2, it is resilient to and insoluble in water. When you are working on chemical equations or building a hypothesis, solubility rules are helpful in predicting the end states of the substances involved. It adopts the fluorite structure and at high pressure the PbCl2 structure. The other fluorides MF2 are are all almost insoluble. The solubility product Ksp of BaF2 is 1. If a molecule does not have this ionic makeup, it is considered nonpolar. In this video we will describe the equation BaF2 + H2O and write what happens when BaF2 is dissolved in water. Term contracts & credit cards/PayPal accepted. Remember to keep your periodic tables handy, and pay close attention to the solubility rules in your next experiment. 94% of StudySmarter users get better grades. Very good index match to water Disadvantages 1. Creative Commons Attribution/Non-Commercial/Share-Alike. H 2 O] is a sparingly soluble salt that is the other major component of kidney stones [along with Ca 3 (PO 4) 2 ]. (2020, January 29). Calculate the value of Ksp . Most silver salts are insoluble. Chromates are frequently insoluble. Barium fluoride (BaF2) is an inorganic compound with the formula BaF2. Thinking about the salt in water experiment now, its clear that the salt- also known as NaCl or sodium chloride, would be highly soluble according to our solubility rules. Which amongst the following respresents a chemical change. Retrieved from https://www.thoughtco.com/solubility-product-from-solubility-problem-609530. Though I can tell this just by glancing at the rules, nothing takes away from the magic of watching chemical compounds break down and dissolve right before your eyes. Does a KitchenAid have a juicer attachment? MathJax reference. This example problem demonstrates how to determine the solubility product of an ionic solid in water from a substance's solubility. The solubility-product constant for CaCO3 is 4.5 10-9 at 25 C. The solubility would then equal the concentration of either the Ag or Cl ions.solubility = [Ag+] = [Cl-]1.26 x 10-5 M = [Ag+] = [Cl-]Ksp = [Ag+][Cl-]Ksp = (1.26 x 10-5)(1.26 x 10-5)Ksp = 1.6 x 10-10, The dissociation reaction of BaF2 in water isBaF2 (s) Ba+ (aq) + 2 F- (aq)This reaction shows that for every mole of BaF2 that dissolves, 1 mole of Ba+ and 2 moles of F- are formed. Sorry i interpreted the question wrong BaF2 is more soluble than BeF2 because for molecules having small anions like flouride , oxide ,hydroxides etc solubility increases down the group because lattice energy decreases .If you fund it useful please approve it. However, solutes can be in any state: gas, liquid, or solid. There are few exceptions to this rule. Magnesium fluoride is highly insoluble in water (0.0076 g/100 mL) at 18C [151]. Polarity is a major factor in a substance's solubility. I was going through JD Lee and I found certain contradictory statements. Its solubility in water at 25C is 7.36 10 4 g/100 mL. Thus, it is insoluble in water. Its KSP at 250c is 1.82X10-4 . Everything you need for your studies in one place. . Check out Tutorbase! So, the minimum solubility is in the middle of the series. Determine whetherCaF2s (role="math" localid="1661513203101" Ksp=3.910-11) tends to precipitate from this mixture. Screen capture done with Camtasia Studio 4.0. The solubility product of AgCl is 1.6 x 10-10.The solubility product of BaF2 is 2 x 10-6. There are essentially no HF molecules. It is very important that the rules on this list are followed in order, because if a rule seems to contradict another rule, the rule that comes first is the one that you follow. It adopts the fluorite structure and at high pressure the PbCl2 structure. Helmenstine, Todd. Rate should not be factored into the solubility of a substance.This can often be confusing when first learning about solubility, since in a visual example, watching something dissolve quickly can feel like an affirmation of its ability to dissolve. The refractive index is about 1.46 from 700nm to 5m.[11]. Hydroxide salts of Group II elements (Ca, Sr, and Ba) are slightly soluble. When a solute is mixed with a solvent, there are three possible outcomes: If the solution has less solute than the maximum amount it is able to dissolve (the solubility), it is a dilute solution. 1. This is partly why it's important to follow the solubility rules closely. The solubility product Ksp of BaF2 is 1.710^-6 at 25C. Does Counterspell prevent from any further spells being cast on a given turn? Spectral range not as good as the soluble materials 3. H Pat Gillis, David W Oxtoby, Laurie J Butler, Question: The Mohr method is a technique for determining the amount of chloride ion in an unknown sample. She worked in book publishing for several years, and believes that books can open up new worlds. 1.7 x 10^-6 Given: solubility in g/100 mL. Examples include PbCrO4 and BaCrO4. It is a colorless solid that occurs in nature as the rare mineral frankdicksonite. [10] Like CaF2, it is resilient to and insoluble in water. What is the purpose of non-series Shimano components? hbspt.cta.load(360031, '4efd5fbd-40d7-4b12-8674-6c4f312edd05', {}); Have any questions about this article or other topics? One of our academic counsellors will contact you within 1 working day. One of the first science experiments I remember was adding salt to a cup of water and waiting eagerly for it to dissolve. The solubility rules are only for ionic solids' ability to dissolve in water. Note that a very small amount of BaF2 would dissolve but very little. Please take a site tour and familiarize yourself with how to typeset here. To learn more, see our tips on writing great answers. Barium fluoride (BaF2) is an inorganic compound with the formula BaF2. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. It is a colorless solid that occurs in nature as the rare mineral frankdicksonite. Hence, in pure water the molar solubility is 7.5110-3mol/L. Study with our articles on every AP Chemistry practice test available and the ultimate AP Chem study guide. For each of the following ionic compounds, state whether the solubility will increase, decrease, or remain unchanged as a solution at pH 7 is made acidic. A solution is considered saturated when adding additional solute does not increase the concentration of the solution. However, sugar would have a low solubility in a nonpolar liquid like vegetable oil. The solubility of a substance fundamentally depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and the pH of the solution. 3. How can I check before my flight that the cloud separation requirements in VFR flight rules are met? At the same time, the BaF2 is a very different substance than Ba 2+ and F-.Knowing the solubility rules can help you determine whether BaF2 will dissolve in water and dissociate into ions (see https://youtu.be/zffVKN6tm7k). F. Like CaF2, it is resilient to and insoluble in water. Powdered NaF is then dissolved in the solution until the solubi lity of BaF2 is 1.0% of that in H2O alone. Connect and share knowledge within a single location that is structured and easy to search. The solubility of different compounds relative to each other in water. Answer = if4+ isPolar What is polarand non-polar? While we can calculate the solubility by measuring each substance and following an equation, the solubility rules allow us to determine the solubility of a substance before you attempt to create it. Solubility Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent. thus the randomness of the molecules increases= positive S Solubility in / Miscibility with Water at 25 C (77 F): 1.2 g/l Soluble Partition coefficient (n-octanol/water): No data available. - YouTube 0:00 / 1:14 Is BaF2 Soluble or Insoluble in Water? Above ca. Strong and can be used in high pressure applications 3. The expression for the solubility product is given by, K sp=[Ba 2+][F ] 2. Additionally, a solution is miscible when it can be mixed together at any ratio- this mainly applies to liquids, like ethanol, C2H5OH, and water, H2O. If you need more non-chemistry science guides, be sure to check out these guides about finding the density of water, defining commensalism, and how to calculate acceleration. Todd Helmenstine is a science writer and illustrator who has taught physics and math at the college level. Barium fluoride is transparent from the ultraviolet to the infrared, from 150 to 200 nm to 1111.5m. If the amount of solute is exactly the same as the solubility it is saturated. 4 Does adding a strong acid increase solubility? Let's take a look at how solubility works to better understand the solubility rules. ThoughtCo, Jan. 29, 2020, thoughtco.com/solubility-product-from-solubility-problem-609530. The answer is that it is slightly soluble in water.. It is also used in metallurgy, as a molten bath for refining aluminium. It responds also to alpha and beta particles, but, unlike most scintillators, it does not emit ultraviolet light. Question. k=4.5 x 10^-9 sqrt (K) = 6.7 x 10^-5 . Luckily, solubility follows a list of rules that helps us determine how soluble a substance is, like how likely that salt is to dissolve into that water (sneak peek- its very likely). Important exceptions to this rule are halide salts of Ag+, Pb2+, and (Hg2)2+. The 11 Solubility Rules and How to Use Them, Get Free Guides to Boost Your SAT/ACT Score, every AP Chemistry practice test available, explain how to balance chemical equations, go over examples of physical vs chemical change here. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. What is the molar solubility of barium fluoride (BaF2) in water? [9] Under standard conditions it adopts the fluorite structure and at high pressure the PbCl2 structure. Question: Is BaF2 ( Barium fluoride ) Soluble or Insoluble in water ? Barium fluoride is an inorganic compound with the formula Ba F 2. "Solubility Product From Solubility Example Problem." As more acid is added to a suspension of Mg(OH)2, the equilibrium shown in Equation 16.4. Lets do an example: The solubility of Ag2CrO4 in water is 1.31 x 10-4 moles/L. [13] Its nonlinearity violates VSEPR theory. BaF2, Kp = 1.5 x 10-6 Ca(OH)2, Ksp - 6,5 x 10-6 SrCros. The molar solubility of BaF2 in NaF is 1.0% of its solubility in pure water. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? How can you explain the solubility of BeF2? Salts containing the ammonium ion (NH4+) are also soluble. Select the compounds that are always soluble in water (bolded are correct). Thus, Fe(OH)3, Al(OH)3, Co(OH)2 are not soluble. Answer = SCl6 is Polar What is polarand non-polar? Which is more soluble in water BaF 2 or BeF Total number of structural isomers of [Co(NH 3 ) 6 ] [Cr(CN) 6 ]. BeF2 is very soluble in water due to the high hydration energy of the small Be+2ion. Very low water solubility 2. Answer = IF4- isNonpolar What is polarand non-polar? The sulphates of calcium, strontium and barium are insoluble, and the carbonates, oxalates, chromates and fluorides of the whole group are insoluble. If we add 0.100M solution AgNO3 drop by drop, will AgCI or AgCrO4 precipitate first? Thalliumthiocyanate (2TlSCN) is only slightly in water. AgCl ->BeF2 : is soluble in water due to evolution of large hydration energy, when it is dissolved in water, which is sufficient enough to overcome the lattice energy of the Berylium Flouride, as for a compound to be soluble in water, the lattice energy of the compound must be less than the hydration energy evolved upon dissolution in water. Free and expert-verified textbook solutions. What is the molar solubility of calcium carbonate ( CaCO3) in water? Solubility from Solubility Product Example Problem, Calculating the Concentration of a Chemical Solution, Use Avogadro's Number to Convert Molecules to Grams, Solubility Product Constants at 25 Degrees Celsius, Covalent or Molecular Compound Properties, Molar Concentration of Ions Example Problem, Equilibrium Concentration Example Problem. What SAT Target Score Should You Be Aiming For? Use MathJax to format equations. The solubility chart is also helpful (see https://youtu.be/b0pDquyGSdk).Often we consider equations showing ions to be net ionic equations. You will see in the solubility rules that many compounds that are labeled as insoluble have exceptions, such as carbonates. Since Ag ClO3 is a silver chlorate, and rule 3 comes before rule 4, it supersedes it. Select the compounds that are always soluble in water, 2. Answer = C2Cl2 is Polar What is polarand non-polar? See how other students and parents are navigating high school, college, and the college admissions process. Calculate its Ksp. Answer: BaF2 ( Barium fluoride ) is Soluble in water What is Soluble and Insoluble ? Although it is an ionic compound, it does not dissociate much into its ions in water, however a small amount does dissolve.When the small amount of BaF2 is dissolved in H2O (water) it will dissociate (dissolve) into Ba 2+ and F- ions. As Todd mentioned, please do not post images with text, rather type text into your post. We receieved your request, Stay Tuned as we are going to contact you within 1 Hour. Viscosity: Dynamic: N/A Barium fluoride | BaF2 | CID 62670 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. However, the process of solubility is unique, and the rate at which it dissolves is not factored into the equation. ACT Writing: 15 Tips to Raise Your Essay Score, How to Get Into Harvard and the Ivy League, Is the ACT easier than the SAT? Barium fluoride is also a common, very fast (one of the fastest) scintillators for the detection of X-rays, gamma rays or other high energy particles. A Comprehensive Guide. We store cookies data for a seamless user experience. The solubility product expression is as follows: Ksp = [Ba2 +][SO2 4] = 1.08 10 10 B To solve this problem, we must first calculate the ion product: Q = [Ba2 +][SO2 4] using the concentrations of the ions that are present after the solutions are mixed and before any reaction occurs. Calculate the concentration of fluoride ion in the solution after addition of the powdered NaF. Calculate the concentration of fluoride ion in the solution after addition of . Its solubility in water at 25C is 7.36 10 4 g/100 mL. For example, a carbonated beverage is a solution where the solute is a gas and the solvent is a liquid. The other fluorides (MgF2, CaF2, SrF2 and BaF2) are almost insoluble in water. How do you calculate solubility in water? . (C) MgF 2 It is an inorganic compound. [12] It can be also used for detection of high-energy (10150 MeV) neutrons, using pulse shape discrimination techniques to separate them from simultaneously occurring gamma photons. Polar "In chemistry, polarity i Is BaF2 ( Barium fluoride ) Soluble or Insoluble in water ? Question: Is B2 2-a Paramagnetic or Diamagnetic ? It only takes a minute to sign up. The solubility-product constant for BaF2 is 1.7x 10-6 at 25C. SAT is a registered trademark of the College Entrance Examination BoardTM. Fluorides such as BaF2, MgF2, and PbF2 are frequently insoluble . Though I was excited to watch the salt seem to disappear I definitely didnt understand the intricacies of solubility. BaF2(s) Ba2+(aq) + 2F-(aq) Because the state is going from Solid to aqueous. If we know that a substance is insoluble, it is likely that it would have excess solute, thus forming a precipitate. A saturated solution of BaF2 at 25C is prepared by equilibrating solid BaF2 with water. Its transmittance at 200nm is relatively low (0.60), but at 500nm it goes up to 0.960.97 and stays at that level until 9m, then it starts falling off (0.85 for 10m and 0.42 for 12m). Most sulfides of transition metals are highly insoluble, including CdS, FeS, ZnS, and Ag2S. Except where otherwise noted, data are given for materials in their, "Crystran Ltd. Optical Component Materials", "Ab initio model potential study of the equilibrium geometry of alkaline earth dihalides: MX2 (M=Mg, Ca, Sr, Ba; X=F, Cl, Br, I)", https://en.wikipedia.org/w/index.php?title=Barium_fluoride&oldid=1141527881, Chemical articles with multiple compound IDs, Multiple chemicals in an infobox that need indexing, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 25 February 2023, at 14:28. 2-. Q: Determine the molar solubility for BaF2 in pure water at 25 C. Question: The Mohr method is a technique for determining the amount of chloride ion in an unknown sample. PubChem . I am struggling calculating the solubility of BaF2 at pH of 4, whats given is the following: BaF2=Ba+2F Ksp=1.7*10^-6 . Step-by-step solution Is CaF2 (Calcium fluoride) soluble or insoluble in water (CaF2 + H2O)? The substance that is dissolved is called a solute, and the substance it is dissolving in is called a solvent. The order of solubility of the alkaline earth fluorides is, after $\ce{BeF2}$ : $\ce{BeF2}$ itself is mentioned as infinitely soluble in water. Hydroxide salts of transition metals and Al3+ are insoluble. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo). b. If there is more solute than is able to be dissolved, the excess separates from the solution and forms a precipitate. Barium fluoride is used as a preopacifying agent and in enamel and glazing frits production. What makes barium fluoride insoluble in water? A saturated solution of BaF2 at 25C is prepared by equilibrating solid BaF2 with water. What is the molar solubility of BaF2 in water? ThoughtCo. Given: solubility in g/100 mL. It is based on the difference in solubility between silver chloride. Beryllium fluoride is very soluble in water, owing to the high solvation energy of Be in forming $\ce{[Be(H2O)4]^2+}$. Important exceptions to this rule include CaSO4, BaSO4, PbSO4, Ag2SO4 and SrSO4 . It is used in windows for infrared spectroscopy, in particular in the field of fuel oil analysis. 3 Ratings (17 Votes) Sign up for free to discover our expert answers. How do you ensure that a red herring doesn't violate Chekhov's gun? Its other use is in the production of welding agents (an additive to some fluxes, a component of coatings for welding rods and in welding powders). The solubility is similar to the concentration of the Ba ions in the solution. As we see from our solubility rules, some substances are very soluble, while some are insoluble or have low solubility. The resulting substance is called a solution. Question = Is SiCl2F2polar or nonpolar ? What is the actual order of solubility of alkaline earth metal fluorides? Which (if any) silver is soluble: Silver chloride AgCl, silver phosphate, Ag3 PO4, or silver fluoride, AgF? On this Wikipedia the language links are at the top of the page across from the article title. To show that they are dissolved in water we can write (aq) after each. Is BaF2 Soluble or Insoluble in Water? 1 Approved Answer. Looking for more chemistry help? A common threshold to describe something as insoluble is less than 0.1 g per 100 mL of solvent. Answer = C2H6O is Polar What is polarand non-polar? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This is a useful factor in qualitative analysis. Approved Other Related Questions on Inorganic Chemistry The 5 Strategies You Must Be Using to Improve 4+ ACT Points, How to Get a Perfect 36 ACT, by a Perfect Scorer. Therefore whatever little solubility these fluorides have that increase down the group. The solubility product constant for The solubility product constant for A: Ksp concept :Ksp : At normal temperature, if the solubility of a salt is 0.1mol / Lit then that salt You can use dozens of filters and search criteria to find the perfect person for your needs. Calculate the molar solubility of barium fluoride, BaF 2, in water at 25C. Solutes typically will dissolve best in solvents that have the most molecular similarities. Estimate the solubility if Thallium thiocyanate in units of gram per 100ml of water. Exceptions: Group 1 and NH4+Note: Rules at the top supersede any lower rules.---We can also look a Solubility Table (https://youtu.be/b0pDquyGSdk). What is the molar solubility of barium fluoride (BaF2) in water? It is based on the difference in solubility between silver chloride (AgCl;kSP = 1.610 - 10)and silver chromate (AgCrO4;KSP = 1.910 - 12) In using this method, one adds a small amount of CI- chromate ion to a solution with unknown chloride concentration. The solubility of silver chloride, AgCl, is 1.26 x 10-5 M at 25 C.The solubility of barium fluoride, BaF2, is 3.15 x 10-3 M at 25 C.Calculate the solubility product, Ksp, of both compounds. So if we have two lead . One of its applications is the detection of 511 keV gamma photons in positron emission tomography. In rule #4, it states that silver salts (Ag) are insoluble, with silver nitrate, AgNO3, as one exception. Prolonged exposure to moisture degrades transmission in the vacuum UV range. With most compounds, on descending the group, the hydration energy decreases more rapidly than the lattice energy: hence the compounds become less soluble as the metal gets larger. Helmenstine, Todd. Question: Suppose 100.0 mL of a 0.0010 M CaCl2solution is added to 50.0 mL of a6.010-5MNaF solution at 25C. Best study tips and tricks for your exams. What makes BaF2 soluble or insoluble in water? 7 10 - 6 at 25C. Question = Is SbCl5 ( Antimony pentachloride ) polar or nonpolar ? . Beryllium fluoride is very soluble in water, owing to the high solvation energy of Be in forming $\ce{[Be(H2O)4]^2+}$. 500C, BaF2 is corroded by moisture, but in dry environments it can be used up to 800C. Most hydroxide salts are only slightly soluble. While many compounds are partially or mostly insoluble, there is no substance that is completely insoluble in water, meaning that it can't dissolve at all. What is the molar solubility of barium fluoride ( BaF2 ) in water? Get the latest articles and test prep tips! At 20C, for example, 177 g of NaI, 91.2 g of NaBr, 35.9 g of NaCl, and only 4.1 g of NaF dissolve in 100 g of water. Using mole ratios, the [Ag+] will go up by (2 x 1.31 x 10-4 moles/L) = 2.62 x 10-4 moles/L. Ksp is really nothing new. The solubility of a substance is an entirely different property from the rate of solution, which is how fast it dissolves. The solubility product Ksp of BaF2 is 1.710-6 at 25C. The solubility product constant for BaF 2 at this temperature is 1.0 10 6. The College Entrance Examination BoardTM does not endorse, nor is it affiliated in any way with the owner or any content of this site. Question = Is if4+polar or nonpolar ? Correct option is C) Let s be the solubility of BaF 2 in BaNO 3 solution. The multiplication of ions of a specific compound when particularly dissolved in an aqueous solution becomes equivalent to solubility product. The Ksp K s p for BaF 2 B a F 2 is 1.0 x 106 10 6 . Question 19 Which of the following substances has the greatest solubility in water? National Center for Biotechnology Information. What ACT target score should you be aiming for? It is less resistant to water than calcium fluoride, but it is the most resistant of all the optical fluorides to high-energy radiation, though its far ultraviolet transmittance is lower than that of the other fluorides. In the vapor phase the BaF2 molecule is non-linear with an F-Ba-F angle of approximately 108.