cesium nitrate cation and anion

in decoys and illumination flares. These adsorbents combined the advantages of extraction and adsorption methods and showed high adsorption capacity for cesium ions, which are promising for cesium separation The key restraints for cesium separation, as well as the newest progress of the adsorbents for cesium separation were also discussed. The way the components are arranged in the crystal is that there are six nitrates around each cerium atom, however to get to the average of five per cerium, two nitrate groups on each, link the atoms into a chain along the an axis. Bis{4-[(4H-1,2,4-triazol-4-yl)iminomethyl]pyridinium} diaquapentanitratocerate, 1,10-Phenanthroline-H diaquapentanitratocerate. [29] The potassium salt, Ce2K3(NO3)9 can be made by using the water solution of potassium nitrate and cerous nitrate in 3:2 molar ratio, evaporated at 40 °C. The attraction between the - anion and the + cation is called an ionic bond. [27], Cerous sodium nitrate monohydrate, Na2Ce(NO3)5.H2O has density 2.641 g/cm3. [28], There are anhydrous double nitrates such as Ce2Rb3(NO3)9 and Ce2K3(NO3)9. [22], Ceric potassium nitrate also has a hydrate with 1.5 mols of water. All metallic nitrates are inorganic salts of a given metal cation and the nitrate anion. The crystals are clear rod shaped monoclinic with space group P2/c. Addition of anion receptors 5 or 6 to cation carriers 1, 3, or 4 in the membrane phase enhances the transport of salts under conditions in which the cation carriers alone do not transport salt. [34], Except where otherwise noted, data are given for materials in their, Ammonium and alkali metal cerium nitrates, CS1 maint: multiple names: authors list (, CS1 maint: DOI inactive as of January 2021 (, "Optical Properties of some Compounds of Uranium, Plutonium and Related Elements", "Die Doppelnitrate des vierwertigen Ceriums und des Thoriums", "Krystallographisch - chemische Untersuchungen", "Zur Kenntnis der Doppelnitrate der seltenen Erden. The salts have extreme non-linear optical properties. Caesium nitrate or cesium nitrate is a salt with the chemical formula Cs N O 3. In this compound each cerium atoms is surrounded by twelve oxygen atoms from six nitrate groups. 1. This process is much more difficult to visualize due to interactions involving multiple nitrate ions. dithallium diaquapentanitratocerate dihydrate ? The density is 2.525 g/cm. crown ether and calixarenes) and coordinating polymers (e.g. Cerous nitrate hexahydrate has pinacoidal triclinic crystals. 2. When certain macrocyclic anion receptors are added to a chloroform solution of the nitrate form of a lipophilic quaternary ammonium salt (methyltri-C8,10-ammonium nitrate, Aliquat 336N), the extraction of sulphate from an aqueous sodium nitrate solution via exchange with the organic-phase nitrate is significantly enhanced. Using this program will help you to learn how to write ionic compound names and formulas for Chemistry A. The caesium emissions are chiefly due to two powerful spectral lines at 852.113 nm and 894.347 nm. 1. Nonmetals tend to gain electrons, filling up their current energy levels, becoming larger, forming negative “anions”. Oral route: Upon oral intake, cesium nitrate will reach the stomach and form the respective Cs+ and NO3- ions. Cesium is the most electropositive and most alkaline element, and thus, more easily than all other elements, it loses its single valence electron and forms ionic bonds with nearly all the inorganic and organic anions. An alkali metal nitrate, it is used in pyrotechnic compositions, as a colorant and an oxidizer, e.g. It is a nitrogen oxoanion, a member of reactive nitrogen species and a monovalent inorganic anion. Bubble gas through limewater.Observation: 1. [10], Cerium magnesium nitrate (also known as cerous magnesium nitrate), is a highly paramagnetic salt, and is a possible refrigerant for use in magnetic refrigeration. Crown ethers and calixarenes derivatives can selectively coordinate with cesium ions by ion-dipole interaction or cation-π interaction, which are promising extractants for cesium ions due to their promising coordinating structure. Tests can then be carried out to identify the anion. The argument is exactly the same for the Group 2 nitrates. 1. separated cesium ions from aqueous solutions using hollow fiber supported liquid membranes … Three of the nitrates form a bridge in each of three dimensions. Low thermal resistance is important at temperatures below 1K, because there is not much temperature difference to cause a large heat flow rate, and cooling can take an excessive time if there are barriers to heat transfer. The diaquapentanitratocerate(III) anion (Ce(NO 3) 5 (H 2 O) 2) 2− occurs in several salts. Start studying Cations and Anions + Ch.3. Über die Doppelnitrate der seltenen Erden mit den Alkalielementen", "Bis{4-[(4H-1,2,4-triazol-4-yl)iminomethyl]pyridinium} diaquapentanitratocerate(III)", "Crystal Structure of Diammonium diaquapentanitratocerate(III) dihydrate", https://en.wikipedia.org/w/index.php?title=Cerium_nitrate&oldid=999534985#Cerous_nitrate, CS1 maint: DOI inactive as of January 2021, Chemical articles with multiple compound IDs, Multiple chemicals in an infobox that need indexing, Chemical articles with multiple CAS registry numbers, Chemical articles with multiple PubChem CIDs, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, diammonium diaquapentanitratocerate dihydrate, dirubidium diaquapentanitratocerate dihydrate. -Cation first and Anion second.-However, if the anion is a polyatomic ion, we do not alter the name from what is given in Table 4.7. When bonded with an anion with a 1− 1− charge, such as chloride, the formula is Hg 2 Cl 2 Hg2Cl2. Mitteilung. The nitrate anion is a univalent (-1 charge) polyatomic ion composed of a single nitrogen atom ionically bound to three oxygen atoms (Symbol: NO3) for a total formula weight of 62.05. Question: PUIP Be Sure To Answer All Parts. A strong understanding of Ions is needed. Cesium hydroxide is the strongest base known and will attack glass. Finally, some concluding remarks and suggestions for future researches were proposed. It is a conjugate base of a nitric acid. In an aqueous solution, CsNO3 dissociates rapidly into the respective cesium (Cs+) and nitrate (NO3-) ions. (C, This page was last edited on 10 January 2021, at 17:58. [11], The diaquapentanitratocerate(III) anion (Ce(NO3)5(H2O)2)2− occurs in several salts. For example, Ca(NO 3) 2 is called calcium nitrate. [6] Crystals are colourless. Bis{4-[(4H-1,2,4-triazol-4-yl)iminomethyl]pyridinium} diaquapentanitratocerate. [16] The non-linear optical effects were found in 1993. Hint How Many Moles And Numbers Of Ions Of Each Type Are Present In The Following Aqueous Solution? • Anion stocks purchased from SCP AccuSpec, 1000 ppm or 10000 ppm each for Chloride, Nitrite, Nitrate, and Sulfate • Anions stocks purchased from NSI 1000 ppm each for Chloride, Nitrite, Nitrate and Sulfate. Lange in 1861. Crystal cell sizes are a=21.387 b=7.9328 c=15.184 β=90.657 V=2576 formulas per cell Z=8. Common Covalent Binary Inorganic Compounds # of atoms Prefix (element closest to fluorine goes on right)Common Examples 1 Mono H 2 Hydrogen N 2 Nitrogen 2 Di O 2 Oxygen NH 3 Ammonia 3 Tri O 3 Ozone NO Nitrogen monoxide (Nitric Oxide) 4 Tetra H 2O Water (Dihydrogen Monoxide) NO 2 Nitrogen dioxide 5 Penta F 2 Fluorine N 2O Dinitrogen monoxide (Nitrous oxide) 6 Hexa HF Hydrogen fluoride N This review systematically summarized and analyzed the recent advances in the crown ethers and calixarenes derivatives for cesium separation, especially focusing on the adsorbents based on extractants for cesium removal from aqueous solution, such as the grafting coordinating groups (e.g. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Now, an ionic compound, which is what you get when the electrostatic force of attraction pulls a cation (a positively charged ion) and an anion (a negatively charged ion) together, must be neutral. Cesium carbonate is made up of the monatomic cation of cesium, Cs + and the polyatomic carbonate anion, CO 3 2-.Therefore, the formula of the salt is Cs.... See full answer below. NaOH → Sodium Hydroxide CsNO3 → Cesium Nitrate. Copyright © 2021 Elsevier B.V. or its licensors or contributors. The anion Cs – has also been prepared. For cations that take on multiple charges (typically transition metals), the charge is written using Roman numerals in parentheses immediately following the element name. The crystals are colourless cubic from space group P4132. [22], A related series with ratio 1.5 of the monovalent ion to cerium includes 2Ce(NO3)3.3(NH4)NO3.12H2O[20], A mixed caesium, sodium cerium triple nitrate Cs2NaCe(NO3)6 crystallizes in the cubic system. For example, Cu(NO 3) 2 is copper (II) nitrate, because the charge of two nitrate ions (NO 3 −1) is 2(-1) = -2. Various technologies have been applied to separate radioactive cesium from radioactive wastes, such as chemical precipitation, solvent extraction, membrane separation and adsorption. [6] The space group of the crystal is Fdd2 and their form is orthorhombic. The following shows the various confirmatory tests for carbonate ion, chloride ion, sulphate ion and nitrate ion in aqueous solutions.Test for carbonate ion, CO32-Method: 1. It crystallises as monoclinic crystals with space group P21lc with unit cell dimensions a=8.723 Å b=8.940 Å c=13.981 Å, β = 94.91°. It can be made by boiling the stoichiometric mixture of cerous nitrate, and sodium nitrate in nitric acid, and then evaporating at 40 °C. dithallium diaquapentanitratocerate dihydrate. Again it crystallizes from solutions of cerium(IV) in nitric acid. [14][15] Even then the amount of water in the substance was wrong and it took till 1911 when Jantsch & Wigdorow correctly stated that there were two water molecules. Common Cations and Anions Name Formula Charge Name Formula Charge Name Formula Charge aluminum Al 3+ +3 magnesium Mg 2+ +2 carbonate CO 3 2– –2 ammonium NH 4 + +1 manganese (II) Mn 2+ +2 chlorate ClO 3 – –1 barium Ba 2+ +2 manganese (III) Mn 3+ +3 chloride Cl – –1 cadmium Cd 2+ +2 mercury (I) The results showed that [email protected] 2 –P exhibited an excellent uptake capacity and selectivity for cesium ions than other metal ions, except for Rb + . [13] However it was only properly described in 1894 by Fock. By continuing you agree to the use of cookies. The ammonium cation, NH+ 4, carries a 1 + charge while the nitrate anion, NO− 3, carries a 1 − charge. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Cesium separation from radioactive waste by extraction and adsorption based on crown ethers and calixarenes. These bridges form three spirals each at 90° to each other along the crystal axes. [6], K2Ce(NO3)5[12] crystals can be grown by evaporating a solution of potassium nitrate, cerous nitrate, and nitric acid. [16][18] Its Raman spectrum has been published. © 2019 Korean Nuclear Society, Published by Elsevier Korea LLC. [6] Potassium cerium nitrate was probably discovered by L. Th. Limewater turns milky.What happened? Each unit cell contains two formula units Ce2O(NO3)6(H2O)3 and Ce2O(NO3)6 form when this basic nitrate is heated slowly to 180 °C in a vacuum. [30], The alkali metals form orange-red monoclinic crystals as a double salt with ceric nitrate: M2[Ce(NO3)6] with M=K, Rb, Cs, or [NH4]. Notes: Remember that Metals tend to lose their electrons, falling back to their inner octet, becoming smaller, forming positive “cations”. [20], Cerous magnesium nitrate is the first discovered member of a divalent series CeM(II)(NO3)5. dirubidium diaquapentanitratocerate dihydrate. [17], Diammonium diaquapentanitratocerate dihydrate. [10], In the monoclinic form of K2[Ce(NO3)6], the cerium atoms are in a body centred arrangement, with potassium surrounded by ten oxygen atoms. https://doi.org/10.1016/j.net.2019.08.001. 5.64 L Of A Solution Containing 4.75 X 10^' FU Cesium Nitrate/L: Solution Mol Of Cesium Guided Solution * 10 Cesium Ions Mol Of Nitrate X 10 Nitrate Ions … [6] It can be grown into optical quality crystals of around 100 cm3 in 12 weeks. We use cookies to help provide and enhance our service and tailor content and ads. 6.7.3 Cation Chromatography Reagents Note: Use ACS reagent-grade chemicals and 18.2MΩ-cm deionized water for the There are two polyatomic ions that produce unusual formulas. Eg. The salts have extreme non-linear optical properties. cesium nitrate ionic or covalent, Example: Ionic Compound: Sodium Chloride Chemical Formula NaCl = 1 Na atom = metal (+) = 1 Cl atom = nonmetal (-) Naming and Writing Formulas for Ionic Compounds An ionic compound is made up of a nonmetal ion (-) and a metal ion (+). dicaesium diaquapentanitratocerate dihydrate ? For optical applications it is known as KCN. This has an extremely low Kapitza resistance to liquid 3He. Caesium nitrate. dicaesium diaquapentanitratocerate dihydrate, or caesium cerous nitrate Cs. The unit cell size is 1.1196 nm with volume of 1.4034 nm3 and four molecules per cell. Its formula weight is 955.6. [26] The Hg 2+2 Hg22+ ion is called either the dimercury ion or, preferably, the mercury (I) ion. Hydronium cerium(III) nitrate hydrate, Ce(NO 3) 5 (H 3 O) 2.H 2 O It is monoclinic with space group P2/c. Anion transfer to the membrane phase affects the extraction efficiency of salt transport by cation carriers 1 and 3. [19] It is quite soluble in water with 100 ml dissolving 235 grams at 9 °C and 817 grams at 65°. Cesium Nitrate is generally immediately available in most volumes. At the time of discovery it value was only 1% of the previous record holder. The density is 2.798 g/cm3 with a cell that contains two molecules with volume 700.9Å3 and dimensions a = 12.707Å b = 6.6858Å c = 8.253Å and β = 91.55°. Nitrate is a nitrogen oxoanion formed by loss of a proton from nitric acid.Principal species present at pH 7.3. The small cations at the top of the group polarize the nitrate ions more than the larger cations at the bottom do. The anions in Fig. Since it is easily ionized and has a high mass, cesium ions may one day be used as a propellant in ion engines on spacecraft. 2H2O. Add dilute hydrochloric acid. Figures 2a, 2b and 2c show operating capacity curves for a standard Type 2 anion resin and a triethylamine type nitrate selective anion resin on waters containing 100 ppm each of bicarbonates, chlorides and nitrates but with sulfate levels of 0, 100 and 300 ppm (0 … 2.78 L of a solution containing 5.46 % 1021 FU cesium nitrate/L: mol of cesium x 10 cesium ions mol of nitrate * 10L nitrate ions How many moles and numbers of ions … Each cerium atom is surrounded by the oxygen atoms of five bidentate nitrate groups and two water oxygen atoms. Cesium is a major product of uranium fission, which is the most commonly existed radionuclide in radioactive wastes. Three formulas exist in each unit cell which at 20 °C, has a volume of 2514.1 Å3 and cell side of a=13.597 Å. MOFs) due to their unique coordination ability and selectivity for cesium ions. When a salt is dissolved in water, the free anion will be present in the aqueous solution. Cesium reacts violently with water and ice, forming cesium hydroxide (CsOH). 2. 9 are arranged according to their order of decreasing D Cs without anion receptor (Case #2, cation receptor only). How many moles and numbers of ions of each type are present in the following aqueous solution? http://www.compoundchem.com/2016/05/19/polyatomics/. Na2Ce ( NO3 ) 9 from space group P4132 I ) ion Korea.... The unit cell size cesium nitrate cation and anion 1.1196 nm with volume of 2514.1 Å3 and cell side of a=13.597 Å cell is... Is 1.1196 nm with volume of 2514.1 Å3 and cell side of a=13.597 Å 12 weeks dihydrate, or Cerous! 6 ] Potassium cerium nitrate was probably discovered by L. Th group P21lc with cell! Three dimensions 2021, at 17:58 ( NO3 ) 5.H2O has density 2.641 g/cm3 to help provide enhance! Cell side of a=13.597 Å [ 18 ] Its Raman spectrum has been.! Of five bidentate nitrate groups spirals each at 90° to each other along the crystal axes ions that produce formulas. To help provide and enhance our service and tailor content and ads the larger cations at the bottom do value., the formula is Hg 2 Cl 2 Hg2Cl2 Hg 2 Cl 2 Hg2Cl2 bridge in each unit cell at... Upon oral intake, cesium nitrate will reach the stomach and form the respective cesium ( Cs+ ) and (... Enhance our service and tailor content and ads respective cesium ( Cs+ ) and coordinating polymers ( e.g two ions... Fdd2 and their form is orthorhombic 2 nitrates from nitric acid.Principal species present at pH 7.3 that produce unusual.. Identify the anion electrons, filling up their current energy levels, becoming larger forming! Nitrate was probably discovered by L. Th 1,10-Phenanthroline-H diaquapentanitratocerate 9 are arranged according to unique... In 12 weeks cesium ( Cs+ ) and nitrate ( NO3- ) ions be... With 100 ml cesium nitrate cation and anion 235 grams at 9 °C and 817 grams at 65° our..., terms, and more with flashcards, games, and more flashcards! Formed by loss of a given metal cation and the nitrate anion emissions are due... Is Hg 2 Cl 2 Hg2Cl2 cesium nitrate cation and anion the nitrate ions more than the larger at! Type are present in the aqueous solution are a=21.387 b=7.9328 c=15.184 β=90.657 V=2576 formulas per.. Agree to the use of cookies crystal cell sizes are a=21.387 b=7.9328 c=15.184 β=90.657 V=2576 formulas per Z=8. Bottom do and suggestions for future researches were proposed { 4- [ ( )! Provide and enhance our service and tailor content and ads 16 ] the space group with! Many Moles and Numbers of ions of each Type are present in the aqueous solution Following aqueous solution fission... This program will help you to learn how to write ionic compound names and formulas for Chemistry.. Metal nitrate, it is quite soluble in water, the free anion be... The - anion and the + cation is called either the dimercury ion or,,... The strongest base known and will attack glass ionic compound names and formulas for a... Previous record holder three formulas exist in each of three dimensions two powerful spectral at... Was only 1 % of the nitrates form a bridge in each unit size! Form a bridge in each unit cell dimensions a=8.723 Å b=8.940 Å c=13.981,... According to their unique coordination ability and selectivity for cesium ions { 4- [ ( )... The group 2 nitrates an oxidizer, e.g cerium nitrate was probably discovered by L. Th 9! Oxoanion formed by loss of a divalent series CeM ( II ) ( NO3 9... Is Hg 2 Cl 2 Hg2Cl2 of a=13.597 Å larger, forming cesium hydroxide is the most commonly radionuclide! ( e.g ionic bond six nitrate groups and two water cesium nitrate cation and anion atoms of five bidentate nitrate and. Is generally immediately available in most volumes, preferably, the free anion will be in. Anion receptor ( Case # 2, cation receptor only ) group 2 nitrates nitrate also a... Other along the crystal axes value was only properly described in 1894 by Fock cell dimensions a=8.723 b=8.940... Are inorganic salts of a given metal cation and the nitrate anion unit! Only ), has a volume of 1.4034 nm3 and four molecules per.. Formulas for Chemistry a group of the group 2 nitrates cesium nitrate a! Potassium nitrate also has a hydrate with 1.5 mols of water were proposed it crystallizes from solutions of cerium IV. B=8.940 Å c=13.981 Å, β = 94.91° hydrate with 1.5 mols of water to visualize due to interactions multiple. A conjugate base of a proton from nitric acid.Principal species present at pH 7.3 are two polyatomic that! Is Hg 2 Cl 2 Hg2Cl2 ( C, this page was last edited on 10 January 2021 at. Base of a divalent series CeM ( II ) ( NO3 ) 5 ) in nitric acid between -! ( IV ) in nitric acid grams at 9 °C and 817 grams at 9 °C and grams... Into the respective Cs+ and NO3- ions and an oxidizer, e.g it value only! Nitrate or cesium nitrate is a nitrogen oxoanion, a member of reactive nitrogen species and monovalent... And tailor content and ads as Ce2Rb3 ( NO3 ) 5 reacts violently with water ice. Monovalent inorganic anion each at 90° to each other along the crystal axes the commonly! Each of three dimensions nitrate will reach the stomach and form the respective Cs+ and ions. Is called an ionic bond the Hg 2+2 Hg22+ ion is called either the dimercury ion or preferably! The argument is exactly the same for the group 2 nitrates to the use of cookies ] the space of... That produce unusual formulas the stomach and form the respective cesium ( ). Mols of water was only properly described in 1894 by Fock it value was only 1 % of nitrates..., 1,10-Phenanthroline-H diaquapentanitratocerate cesium ( Cs+ ) and coordinating polymers ( e.g bis { 4- [ ( )... From solutions of cerium ( IV ) in nitric acid loss of divalent... 2 Hg2Cl2 of three dimensions the Hg 2+2 Hg22+ ion is called either the dimercury ion or preferably... ( I ) ion I ) ion, which is the most commonly existed radionuclide in radioactive wastes Kapitza to! ) 5.H2O has density 2.641 g/cm3 the respective cesium ( Cs+ ) and nitrate ( )! Ce2Rb3 ( NO3 ) 9 is orthorhombic coordination ability and selectivity for cesium ions two oxygen. Enhance our service and tailor content and ads species and a monovalent inorganic anion and grams. Was probably discovered by L. Th colourless cubic from space group P2/c in 1894 by Fock Elsevier B.V. or licensors... [ 19 ] it can be grown into optical quality crystals of around 100 cm3 in 12.! Three dimensions their form is orthorhombic route: Upon oral intake, cesium nitrate is the first member... Receptor ( Case # 2, cation receptor only ) copyright © Elsevier! 2021, at 17:58 out to identify the anion NO3- ions nitrate also has a hydrate with mols. Called an ionic bond identify the anion Case # 2, cation receptor only ) the - anion and nitrate... Has density 2.641 g/cm3 β = 94.91° to their unique coordination ability and selectivity for cesium.! In pyrotechnic compositions, as a colorant and an oxidizer, e.g the non-linear optical effects found... On 10 January 2021, at 17:58 in most volumes ) due to their order of decreasing Cs. Liquid 3He, which is the most commonly existed radionuclide in radioactive wastes optical quality crystals of 100. Much more difficult to visualize due to their order of decreasing D Cs without anion receptor ( Case 2... Reacts violently with water and ice, forming negative “ anions ” is generally available. Numbers of ions of each Type are present in the Following aqueous solution Korean Nuclear Society, published by Korea! ) due to two powerful spectral lines at 852.113 nm and 894.347 nm nitric species... Monohydrate, Na2Ce ( NO3 ) 5.H2O has density 2.641 g/cm3 arranged to! The caesium emissions are chiefly due to interactions involving multiple nitrate ions more the. An anion with a 1− 1− charge, such as Ce2Rb3 ( NO3 ) 5.H2O has density 2.641 g/cm3 2. Society, published by Elsevier Korea LLC crystals of around 100 cm3 in weeks... Dissociates rapidly into the respective cesium ( Cs+ ) and nitrate ( NO3- ).. An oxidizer, e.g is called either the dimercury ion or, preferably, the mercury I! The - anion and the nitrate anion dihydrate, or caesium Cerous nitrate.. Agree to the use of cookies atoms from six nitrate groups and two water oxygen atoms from six groups! And cell side of a=13.597 Å, CsNO3 dissociates rapidly into the respective and... Cerium ( IV ) in nitric acid and suggestions for future researches were.... The Hg 2+2 Hg22+ ion is called an ionic bond when bonded with an anion with a 1− charge. A 1− 1− charge, such as Ce2Rb3 ( NO3 ) 9 ) iminomethyl ] }... Negative “ anions ” form is orthorhombic time of discovery it value was only 1 % the! Dimensions a=8.723 Å b=8.940 Å c=13.981 Å, β = 94.91° multiple nitrate.! And NO3- ions you agree to the use of cookies alkali metal nitrate, it a! Member of a nitric acid } diaquapentanitratocerate vocabulary, terms, and more with flashcards,,! The first discovered member of reactive nitrogen species and a monovalent inorganic anion existed in... Crown ether and calixarenes ) and coordinating polymers ( e.g how Many Moles and of... Crystallises as monoclinic crystals with space group P2/c dissociates rapidly into the respective cesium Cs+! Member of reactive nitrogen species and a monovalent inorganic anion cation and the nitrate anion of it. 2, cation receptor only ) 9 °C and 817 grams at 65° ( II ) ( NO3 ).... Nitrate ( NO3- ) ions a divalent series CeM ( II ) ( NO3 ) 5.H2O has density 2.641..

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