Table 20.2 Half-reaction E° (V) Cr3+ (aq) + 3e--Cr(s) Fe2+ (aq) + 2e -Fe (s) Fe3+ (aq) + e-Fe2+ (s) Sn+ (aq) + -0.74 -0.440 +0.771 + 2e- - Sn2+ (aq) +0.154 Error correction: Note the third line in the table should read: Fe3+ (ag) + e¯ --> Fe2+ (ag) Which of the following reactions will occur spontaneously as written? O a. Sn 4+ 2+ (ag) + Fe (s) Sn 2+ (aq) + Fe (s) Ob. 2Cr (s) + 3Fe 2+ (s)→ 3Fe (s) + 2Cr 3+ (aq) 3+ 2+ 4+ (ag) + 2Cr (s) C. 2Cr (aq) – 3Sn (aq)+3Sn 2+ d. 3Fe (aq) + Cr 3+ (ag) – Cr (s) + 3Fe 3+ (aq)

Table 20.2 Half-reaction E° (V) Cr3+ (aq) + 3e--Cr(s) Fe2+ (aq) + 2e -Fe (s) Fe3+ (aq) + e-Fe2+ (s) Sn+ (aq) + -0.74 -0.440 +0.771 + 2e- - Sn2+ (aq) +0.154 Error correction: Note the third line in the table should read: Fe3+ (ag) + e¯ --> Fe2+ (ag) Which of the following reactions will occur spontaneously as written? O a. Sn 4+ 2+ (ag) + Fe (s) Sn 2+ (aq) + Fe (s) Ob. 2Cr (s) + 3Fe 2+ (s)→ 3Fe (s) + 2Cr 3+ (aq) 3+ 2+ 4+ (ag) + 2Cr (s) C. 2Cr (aq) – 3Sn (aq)+3Sn 2+ d. 3Fe (aq) + Cr 3+ (ag) – Cr (s) + 3Fe 3+ (aq)

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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