For the titration of HOCl in bleach solution by Na2S2O4 the following reactions are used: HOCl-(aq) + H2O(l) + 2I- (aq) → I2(aq) + 2Cl-(aq)+ 2OH-(aq) I2(aq) + 2S2O4-2(aq) → 2I- (aq) + S4O6-2(aq) What is the molar stoichiometric ratio between analyte and titrant ? a. 1 mole analyte : 1 moles titrant b. 1 mole analyte :2 moles titrant c. 2 mole analyte : 1 moles titrant d. 3 mole analyte :2 moles titrant

For the titration of HOCl in bleach solution by Na2S2O4 the following reactions are used: HOCl-(aq) + H2O(l) + 2I- (aq) → I2(aq) + 2Cl-(aq)+ 2OH-(aq) I2(aq) + 2S2O4-2(aq) → 2I- (aq) + S4O6-2(aq) What is the molar stoichiometric ratio between analyte and titrant ? a. 1 mole analyte : 1 moles titrant b. 1 mole analyte :2 moles titrant c. 2 mole analyte : 1 moles titrant d. 3 mole analyte :2 moles titrant

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter10: Fuels, Organic Chemicals, And Polymers

Section: Chapter Questions

Problem 115QRT

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cedric and astrid titrated a 15.00 ml aliquot of grapefruit juice with a 0.134 M NaOH solution to the end point. the initial buret reading was 1.04 ml and the final buret reading was 24.83ml. H3C6H5O7(aq) + 3 NaOH(aq) yeilds Na3C6H5O7(aq) + 3 H2O)(l) The volume of NaOH titrated is 23.79ml 24.83ml - 01.04ml = 23.79ml of NaOH ***What is the mass of citric acid in the juice sample? 0.204g of H3C6H5O7 ( can you please show how to calculate this answer)
In an analysis of metal carbonate M2CO3∙3H2O, 1.500g of the unknown carbonate was dissolved in enough water to make a 100.0mL solution. 20.00mL of such solution was treated with 10.00mL of 1.000M HCl solution, and the excess acid was titrated with 54.92mL of 0.1138M NaOH solution. The equations are given below: CO32-(aq) + 2 H+(aq) → H2O(l) + CO2(g) H+(aq) + OH-(aq) → H2O(l) a) the moles of NaOH used in the titration is (enter the answer in 4 sig. figs.) Answer mol b) the mole of HCl reacted with the carbonate is (enter the answer in 4 sig. figs.) Answer mol c) the molar mass of M2CO3∙3H2O is (enter the answer in 4 sig. figs.) Answer g/mol d) the identity of metal M is (enter the element symbol) Answer
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2.4414 g sample containing KCl, K2SO4and inert materials was dissolved in sufficient water to give 250 mL of solution. A Mohr titration of a 50 mLaliquot required 41.36 mL of 0.05818 M AgNO3. A second 50mL aliquot was treated with 40 mL of 0.1083M NaB(C6H5)4. The reaction is NaB(C6H5)4+ K+ KB(C6H5)4(s)+ Na+. The solid was filtered, redissolved in acetone, and titrated with 49.98mLof the AgNO3solution according to the reaction KB(C6H5)4+ Ag+ AgB(C6H5)4(s)+ K+. Calculate the percentage of KCl and K2SO4in the sample.
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