QUESTION 1 Which of the following is an example of an oxidation half-reaction? Cu2+ + 20 > Cu Cu > Cư + 2e" O cu + Co. > CuCO, CuCle + 2 e -> Cu +2 CI QUESTION 2 The following is the skeletal equation for the redox reaction of copper metal with nitric acid: -Cufs) + HNOlac) +-H* --->- Cu"(aq) +- NO(g) +- H2O Using the oxidation number method to balance the equation, what are the respective coefficients for the reactants and products of the reaction? O 3, 2, 6-3, 2, 4 O 2, 3, 7-2, 3, 5 O 1,2,6 - 1, 2, 4 O 2, 1,5-2, 1, 3 QUESTION 3 in which of the following compounds does the underlined element have an oxidation number of +27 O HNO PH, ZalOH

QUESTION 1 Which of the following is an example of an oxidation half-reaction? Cu2+ + 20 > Cu Cu > Cư + 2e" O cu + Co. > CuCO, CuCle + 2 e -> Cu +2 CI QUESTION 2 The following is the skeletal equation for the redox reaction of copper metal with nitric acid: -Cufs) + HNOlac) +-H* --->- Cu"(aq) +- NO(g) +- H2O Using the oxidation number method to balance the equation, what are the respective coefficients for the reactants and products of the reaction? O 3, 2, 6-3, 2, 4 O 2, 3, 7-2, 3, 5 O 1,2,6 - 1, 2, 4 O 2, 1,5-2, 1, 3 QUESTION 3 in which of the following compounds does the underlined element have an oxidation number of +27 O HNO PH, ZalOH

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter18: Oxidation–reduction Reactions And Electrochemistry

Section: Chapter Questions

Problem 4ALQ

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Gold metal will dissolve only in aqua regia, a mixture of concentrated hydrochloric acid and concentrated nitric acid in a 3:1 volume ratio. The products of the reaction between gold and the concentrated acids are AuCl4-(aq), NO(g), and H2O. The equation for this reaction where HNO3 and HCl are strong acids is Au(s)+4Cl(aq)+4H+(aq)+NO3(aq)AuCl4(aq)+NO(g)+2H2O(a) What stoichiometric ratio of hydrochloric acid to nitric acid should be used? (b) What volumes of 12 M HCl and 16 M are HNO3 required to furnish the Cl- and NO3- ions to react with 25.0 g of gold?
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