# Problem: Indicate whether each of the following statements is True or False and explain why.a) Chromium metal can dissolve in dilute HCl.b) Iron metal will reduce Fe3+ to Fe2+.c) Silver metal will dissolve in nitric acid, liberating H2 gas.d) Oxygen in moist air can oxidize Fe2+ to Fe3+.

###### FREE Expert Solution

Indicate whether each of the following statements is True or False and explain why.

a) Chromium metal can dissolve in dilute HCl.

• Larger (↑) E° → reduction
• Cr3+(aq) + 3e - → Cr(s)  E° = -0.74 V
• HCl is strong so it produces H+.
• 2 H+(aq) + 2e - → H2(g)  E° = 0 V
• Since E° of Cr3+ is less than for H+,  2 H+(aq) + 2e - → H2(g) is reduction.
• So Cr3+(aq) + 3e - → Cr(s) will be reversed to be an oxidation reaction and the redox reaction would proceed.

True, Chromium metal can dissolve in dilute HCl.

84% (125 ratings) ###### Problem Details

Indicate whether each of the following statements is True or False and explain why.

a) Chromium metal can dissolve in dilute HCl.

b) Iron metal will reduce Fe3+ to Fe2+.

c) Silver metal will dissolve in nitric acid, liberating H2 gas.

d) Oxygen in moist air can oxidize Fe2+ to Fe3+.