1. Balance the following redox reactions in acidic or basic solution a. NH3(g) + O2(g)= NO(g) + H20(O [acidic] b. Pb02 + Cl¯= Clo- + Pb(OH)3 [basic] c. Ag2S + CN- + 02=S+ Ag(CN)2" + H20(!) [basic] When metal A is placed in a solution of a salt of metal B, the surface of metal A changes color. When metal B is placed in acid solution, gas bubbles form on the surface of the metal. When metal A is placed in a solution of salt and metal C, no change is observed in the solution or on the metal A surface. 2. a. For each observation stated, what conclusions can you draw? b. From these observations rank metals A, B and C in order of likelihood to oxidize and make a standard reduction potential table for the half-reactions in this problem. c. Will metal C cause formation of H2 when placed in acid solution?

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Balance the following redox reactions in acidic or basic solution
a. NH3(g) + Oz(g) NO(g) + H20(!)
1.
[acidic]
b. Pb02 + Cl- cl0- + Pb(OH),
[basic]
c. Ag2S + CN- + 02S+ Ag(CN)2° + H2O(!)
[basic]
When metal A is placed in a solution of a salt of metal B, the surface of metal A
changes color. When metal B is placed in acid solution, gas bubbles form on the
surface of the metal. When metal A is placed in a solution of salt and metal C, no
change is observed in the solution or on the metal A surface.
2.
a. For each observation stated, what conclusions can you draw?
b. From these observations rank metals A, B and C in order of likelihood to oxidize
and make a standard reduction potential table for the half-reactions in this
problem.
c. Will metal C cause formation of H2 when placed in acid solution?
Consider the electrochemical cell depicted as
Zn(s) | Zn(NO3)2 (x M)|| Cu(NO3)2 (y M) | Cu(s).
Choose the correct Nernst equation for the cell and explain how you arrived at your
3.
(a)
answer.
[Zn2+]
- log Cu2+]
[Cu²+]
-log
[Zn²+]
0.05916 V
0.05916 V
А.
Ecell = Eell
В.
Ecell = Eell
(b)
What is Ecell if [Zn²+] = 0.01 M and [Cu2+] = 1.0 M?
(c)
What will Ecell be when [Cu2+] has fallen to 0.50 M?
(d)
What will [Zn2+] be when Ecel is 1.00 V?
Transcribed Image Text:Balance the following redox reactions in acidic or basic solution a. NH3(g) + Oz(g) NO(g) + H20(!) 1. [acidic] b. Pb02 + Cl- cl0- + Pb(OH), [basic] c. Ag2S + CN- + 02S+ Ag(CN)2° + H2O(!) [basic] When metal A is placed in a solution of a salt of metal B, the surface of metal A changes color. When metal B is placed in acid solution, gas bubbles form on the surface of the metal. When metal A is placed in a solution of salt and metal C, no change is observed in the solution or on the metal A surface. 2. a. For each observation stated, what conclusions can you draw? b. From these observations rank metals A, B and C in order of likelihood to oxidize and make a standard reduction potential table for the half-reactions in this problem. c. Will metal C cause formation of H2 when placed in acid solution? Consider the electrochemical cell depicted as Zn(s) | Zn(NO3)2 (x M)|| Cu(NO3)2 (y M) | Cu(s). Choose the correct Nernst equation for the cell and explain how you arrived at your 3. (a) answer. [Zn2+] - log Cu2+] [Cu²+] -log [Zn²+] 0.05916 V 0.05916 V А. Ecell = Eell В. Ecell = Eell (b) What is Ecell if [Zn²+] = 0.01 M and [Cu2+] = 1.0 M? (c) What will Ecell be when [Cu2+] has fallen to 0.50 M? (d) What will [Zn2+] be when Ecel is 1.00 V?
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