Explanation M n O 4 − ( a q ) + Z n ( s ) → M n 2 + ( a q ) + Z n 2 + ( a q ) Step1: Separate the overall reaction into two half-reactions: one for oxidation and one forreduction. For oxidation Z n ( s ) → Z n + 2 ( a q ) For reduction M n O 4 − ( a q ) → M n + 2 ( a q ) Step2: Balance the main elements excluding H, O. For oxidation Z n ( s ) → Z n + 2 ( a q ) For reduction M n O 4 − ( a q ) → M n + 2 ( a q ) Step3: Balance the H, O. For oxidation Z n ( s ) → Z n + 2 ( a q ) For reduction M n O 4 − ( a q ) + 8 H + ( a q ) → M n + 2 ( a q ) + 4 H 2 O ( l ) In these half-reactions, all elements are balanced including H, O. Hence, in the next step we need to balance the charge. Step4: Balance each half-reaction with respect to charge by adding electrons. For oxidation Z n ( s ) → Z n + 2 ( a q ) + 2 e − For reduction M n O 4 − ( a q ) + 8 H + ( a q ) + 5 e − → M n + 2 ( a q ) + 4 H 2 O ( l ) Step5: Make the number of electrons in both half-reactions equal by multiplying one or both half-reactions by a small whole number. For oxidation 5 × [ Z n ( s ) → Z n + 2 ( a q ) + 2 e − ] For reduction 2 × [ M n O 4 − ( a q ) + 8 H + ( a q ) + 5 e − → M n + 2 ( a q ) + 4 H 2 O ( l ) ] By adding these two reactions, we have 2 M n O 4 − ( a q ) + 16 H + ( a q )

Chemistry: A Molecular Approach Plus Mastering Chemistry with Pearson eText -- Access Card Package (4th Edition) (New Chemistry Titles from Niva Tro)

4th Edition

ISBN: 9780134103976

Author: Nivaldo J. Tro

Publisher: PEARSON

See similar textbooks

Question

Chapter 19, Problem 105E

Interpretation Introduction

To balance the equation and determining the volume of a 0.500 M KMnO4 solution required to completely react with 2.85g of Zn.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 19, Problem 104E

Chapter 19, Problem 106E

Students have asked these similar questions

2. 200 LOD For an unknown compound with a molecular ion of 101 m/z: a. Use the molecular ion to propose at least two molecular formulas. (show your work) b. What is the DU for each of your possible formulas? (show your work) C. Solve the structure and assign each of the following spectra. 8 6 4 2 (ppm) 150 100 50 ō (ppm) 4000 3000 2000 1500 1000 500 HAVENUMBERI-11

Complete the spectroscopy with structure

Chapter 19 Solutions

Chemistry: A Molecular Approach Plus Mastering Chemistry with Pearson eText -- Access Card Package (4th Edition) (New Chemistry Titles from Niva Tro)

Ch. 19 - Prob. 1SAQ Ch. 19 - Q2. Which statement is true for voltaic cells? a)...Ch. 19 - Prob. 3SAQ Ch. 19 - Prob. 4SAQ Ch. 19 - Prob. 5SAQ Ch. 19 - Prob. 6SAQ Ch. 19 - Prob. 7SAQ Ch. 19 - Prob. 8SAQ Ch. 19 - Prob. 9SAQ Ch. 19 - Prob. 10SAQ

Knowledge Booster

To balance the equation and determining the volume of a 0.500 M K M n O 4 solution required to completely react with 2.85g of Zn.

To balance the equation and determining the volume of a 0.500 M KMnO4 solution required to completely react with 2.85g of Zn.

Want to see the full answer?

Chapter 19 Solutions