Please answer in full and adhere to significant figures Question 22.1 The Ksp of Al2S3 is 1.99 × 10-7. Estimate the solubility of this salt in units of g. L-1.You must show any reaction equation(s) that you may think are necessary.2.2 Ifa sample of solid Af,S3 is stirred into exactly one litre of a 0.550M solution of Na,S, how willthe solubility of the salt compare with the answer that you have obtained in question 2.1?Explain you answer in a short sentence.

The sparingly soluble salt AxBy dissolved and dissociate into ions to form xAy+ and yBx- and has…

Answered: Question 2 The Ksp of Al2S3 is 1.99 x…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter17: Complexation And Precipitation Reactions And Titrations

Section: Chapter Questions

Problem 17.34QAP

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At 25C, 10.24 mg of Cr(OH)2 are dissolved in enough water to make 125 mL of solution. When equilibrium is established, the solution has a pH of 8.49. Estimate Ksp for Cr(OH)2.
0.28g 0f MBr is dissolved in distilled water and made up to 250mL mark in a volumetric flask. 25 mL of this solution is titrated against 0.019 M silver nitrate solution using eosin as indicator. The end point was obtained at 12.4 mL of AgNO3 solution . Calculate the molar mass of the metal bromide.
If a sample of silver coin weighing 0.5230 g gives a precipitate of AgCl (143.45) weighing 0.3559 g, the weight of AgBr (187.90) that could have been obtained from the same weight of sample is 0.89 grams. true or false?
1. How is complete precipitation assured in the Group III Cations? 2. In the confirmatory test of Magnesium ion, why is it necessary to heat the centrifugate in water bath for 5 minutes? 3. If Magnesium hydroxide is a white gelatinous precipitate, why is the confirmatory result indicated a blue precipitate?
If the molar solubility of PbCrO4 at 25 oC is 5.48e-07 mol/L, what is the Ksp at this temperature?Ksp = (b) It is found that 1.08e-09 g of Fe(OH)3 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Fe(OH)3.Ksp = (c) The Ksp of Mg3(PO4)2 at 25 oC is 1.04e-24. What is the molar solubility of Mg3(PO4)2?solubility = mol/L
The Zn in a 0.6803-g sample of foot powder was titrated with 27.3 mL of 0.04246 M EDTA. Calculate the percentage of Zn (65.39g/mol) in this sample.
What is the concentration of Cd2+ in a 0.016 M Cd(NO3)2 solution that is also 1.0 M NH3? For Cd(NH3)42+, Kf = 1.0 x 107.
The digestion of a 0.1159 gram sample of a phosphorous-containing compound in a mixture of HNO3 and H2SO4 resulted in the formation of CO2, H2O, and H3PO4. Addition of ammonium molybdate yielded a solid having the composition (NH4)3PO4·12MoO3 (FW = 1876.3). This precipitate was filtered, washed, and dissolved in 50.00 mL of 0.2000 M NaOH: (NH4)3PO4•12MoO3(s)+26OH-(aq)->HPO42-(aq)+12MoO42-(aq)+14H2O(l)+3NH3(g) After the solution was boiled to remove the NH3, the excess NaOH was back-titrated with 14.84 mL of 0.1626 M HCl to a phenolphthalein end point. Calculate the percent phosphorous (FW = 30.9737) in the sample.
Give the formula of a compound which will give a precipitate with KI and K3PO4? SOLUBILITY RULES Solubilities of ionic substances in water: 1) All salts of Na+, K+, NH4+ are soluble in water. 2) All salts of NO3-, CH3COO- (C2H3O2-) are soluble in water. 3) All salts of Cl-, Br-, I- are soluble in water (except Ag+, Pb2+, Hg22+ ) 4) All salts of SO42- are soluble in water ( except Ba2+, Pb2+, Sr2+) SO42- of Ca2+, Ag+, Hg22+ are slightly soluble in water. 5) All salts of CO32-, PO43- are insoluble in water (except Na+, K+, NH4+) 6) All salts of S2- are insoluble in water ( except Na+, K+, NH4+, Ba2+,Ca2+, Mg2+, Sr2+) 7) All salts of O2-, OH- are insoluble in water ( except Na+, K+, NH4+, (Ba2+)) OH- of Ca2+, Sr2+, (Ba2+) are slightly soluble in water OH- of Mg2+ is very very slightly soluble in water STRONG ACIDS STRONG BASES HCl LiOH HBr…
gives solubilities of the following compounds in grams per 100 mL of water. Because these compounds are only slightly soluble, assume that the volume does not change on dissolution and calculate the solubility product for each.(a) BaSiF6, 0.026 g/100 mL (contains SiF6 2− ions)(b) Ce(IO3)4, 1.5 × 10–2 g/100 mL(c) Gd2(SO4)3, 3.98 g/100 mL(d) (NH4)2PtBr6, 0.59 g/100 mL (contains PtBr6 2− ions)
A 1.43 x 10-4 L solution of 45.7 mg/mL protein was analyzed using the Kjeldahl procedure. After digestion of the protein, the liberated NH3 was collected in 9.80 mL of 0235 M HCl. The unreacted acid required 10.75 mL of a standard solution of 0.0149 M NaOH for complete titration. Calculate the weight percent of nitrogen in the protein. (Molar mass N = 14.00674 g/mol)
Suppose that 0.323 g of an unknown sulfate salt is dissolved in 50 mL of water. The solution is acidified with 6 M HCl, heated, and an excess of aqueous BaCl2 is slowly added to the mixture resulting in the formation of a white precipitate. 1) Assuming that 0.433 g of precipitate is recovered calculate the percent by mass of SO42− in the unknown salt. 2) If it is assumed that the salt is an alkali sulfate determine the identity of the alkali cation.

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