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# 24. What current (in A) would have to be applied for 10 minutes in order to plate out 1.0 gram of chromium metal from a 0.250-M solution of

24. What current (in A) would have to be applied for 10 minutes in order to plate out 1.0 gram of chromium metal from a 0.250-M solution of chromium(III) ion?
a. 3.1
b. 5.6 x 102
c. 1.0
d. 4.8 x 102
e. 9.3
25. Use the following standard reduction potentials in V: Ag+ → Ag, +0.80; Fe2+ → Fe, -0.41; Fe3+ → Fe, -0.04; Mn2+ → Mn, -1.18; Zn2+ → Zn, -0.76. The electrical potential of the cell represented above is 0.46 Â± 0.01 volts. Identify X.
(diagram attached)
a. Zn
b. Ag
c. Fe
d. Mn
e. Cu
26. Respective standard reduction potentials in V for Pb2+ and Ni2+ are -0.13 and -0.28. Which substance will be oxidized in the voltaic cell below?
(diagram attached)
a.  Pb
b. Ni2+
c. Ni
d. Pb2+
e. No substance will be oxidized because the reaction is nonspontaneous.
27. What is the coefficient of the hypochlorite ion when the following equation is balanced?
Cl0- + S2032- → Cl- + S042- (basic solution)
a. 1
b.  3
c. 2
d. 4
28. Which of the halogens in Table 20.1 is the strongest oxidizing agent?
(Table attached)
a.  I2
b. F2
c. Cl2
d. Br2
29. What is the coefficient of the permanganate ion when the following equation is balanced?
Mn04- + Br- → Mn2+ + Br2 (acidic solution)
a. 1
b. 3
c. 2
d. 5
e. 4

Question 25 diagram
Question 26 diagram
Question 28 Table

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