93 Chemistry I Laboratory Manual, 2019 Revision Questions: 1o vaislom (E 1) Samples containing iron(II) ion can be titrated with solutions containing dichromate ion under acidic conditions. OcHS Cr20,2- + 6Fe2+ + 14H→ 2Cr³+ + 6FE3+ + 7H2O (a) Which ion is oxidized in this reaction? (b) Which ion is the reducing agent in this reaction? (c) If a 1.924 g sample containing iron(II) sulfate is dissolved and requires 36.1 mL of 0.0100 M K2C12O7 solution to titrate it, what is the percent iron(II) sulfate in the sample? Broxide on KHF HP is a on nt pri

93 Chemistry I Laboratory Manual, 2019 Revision Questions: 1o vaislom (E 1) Samples containing iron(II) ion can be titrated with solutions containing dichromate ion under acidic conditions. OcHS Cr20,2- + 6Fe2+ + 14H→ 2Cr³+ + 6FE3+ + 7H2O (a) Which ion is oxidized in this reaction? (b) Which ion is the reducing agent in this reaction? (c) If a 1.924 g sample containing iron(II) sulfate is dissolved and requires 36.1 mL of 0.0100 M K2C12O7 solution to titrate it, what is the percent iron(II) sulfate in the sample? Broxide on KHF HP is a on nt pri

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A quantitative analysis for ethanol, C2H60, is accomplished by a redox back titration. Ethanol is oxidized to acetic acid, C2H402, using excess dichromate, 3+ Cr207 2-, which is reduced to Cr3*. The excess dichromate is titrated with Fe2*, giving C and Fe+ as products. In a typical analysis, a 5.00-mL sample of a brandy is diluted to 500 mL in a volumetric flask. A 10.00-mL sample is taken and the ethanol is removed by distillation and collected in 50.00 mL of an 2- acidified solution of 0.0200 M K2Cr207. Titration of the unreacted Cr207 requires 21.48 mL of 0.1014 M Fe2*. Calculate the %w/v ethanol in the brandy. Which is the titrant in this problem? C2H402 Fe2+ C2H60 O Cr207 2-
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