// IN B R tion 8 of 25 2 NaCl(aq) + K, S(aq) → Na, S(aq) + 2 KCI(aq) (3)°0E + (s)1D – (s)*(*01) O acid-base neutralization O acid-base neutralization O precipitation O precipitation xopə1 O none of these reaction types хораг none of these reaction types KOH(aq) + AgNO, (aq) KNO, (aq)+A£OH(s) CaO(s) + CO,(g) → CACO3(s) → CaCO,(s) O acid-base neutralization O acid-base neutralizatin O precipitation O precipitation хорәл none of these reaction types xopə1 O O none of these reaction types Ba(OH), (aq) +2 HNO, (aq) Ba(NO,),(aq) + 2 H,O(I) O acid-base neutralization O precipitation MacBook Pro Q Search or enter website name | & %24 4 %23 7. 5. 6. { 3. E. K. C.

// IN B R tion 8 of 25 2 NaCl(aq) + K, S(aq) → Na, S(aq) + 2 KCI(aq) (3)°0E + (s)1D – (s)(01) O acid-base neutralization O acid-base neutralization O precipitation O precipitation xopə1 O none of these reaction types хораг none of these reaction types KOH(aq) + AgNO, (aq) KNO, (aq)+A£OH(s) CaO(s) + CO,(g) → CACO3(s) → CaCO,(s) O acid-base neutralization O acid-base neutralizatin O precipitation O precipitation хорәл none of these reaction types xopə1 O O none of these reaction types Ba(OH), (aq) +2 HNO, (aq) Ba(NO,),(aq) + 2 H,O(I) O acid-base neutralization O precipitation MacBook Pro Q Search or enter website name | & %24 4 %23 7. 5. 6. { 3. E. K. C.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

ChapterA1: Evaluation Of Analytical Data

Section: Chapter Questions

Problem A1.22QAP

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Gravimetric analysis of Fe3O4 (MW = 232 g/mole) may be undertaken with the following reactions: Fe3O4 → Fe2O3 → Fe (OH)3. Weight of sample containing 8.00% Fe3O4 that must be taken to obtain a precipitate of Fe(OH)3 (MW = 107 g/mole) that weighs 150 mg is . a. 0.108 g b. 0.325 g c. 1.355 g d. 4.065 g Amount of Fe2O3 (MW = 160 g/mole) from which 150 mg of Fe(OH)3 (MW = 107 g/mole) may be obtained is . a. 0.112 g b. 0.224 g c. 0.448 g d. none of the other choices
Sodium carbonate is a reagent that may be used to standardize acids in the same way that you have used KHP in this experiment. In such a standardization it was found that a 0.498-g sample of sodium carbonate required 24.8 mLmL mL of a sulfuric acid solution to reach the end point for the reaction. Na2CO3(aq)+H2SO4(aq)→H2O(l)+CO2(g)+Na2SO4(aq)Na2CO3(aq)+H2SO4(aq)→H2O(l)+CO2(g)+Na2SO4(aq) What is the molarity of the H2SO4H2SO4?
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A 0.2500-g of dry CaCO3 was completely dissolved into a solution of 5-mL conc. HCl and 50-mL distilled water in an erlemeyer flask. The resulting solution was boiled for 5 minutes to expel CO2 from the reaction, and then it was cooled to room temperature and the solution was transferred in a 500-mL volumetric flask filled to volume by rinsing the erlenmeyer flask and combining all the washings to fill the mark. A 5.0-mL aliquot of the CaCl2 solution was taken from the orignal solution and was transferred into an erlenmeyer flask with 10-mL NH3 buffer, 20-mL distilled water, and 5 gtts of EBT. The solution consumed 4.96 mL of an EDTA solution. MW: CaCO3 = 100.1 Compute for the N EDTA solution. 0.0053 N 0.0531 N 0.5313 N None of the choices
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