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96. Write equations for the half-reactions that occur at the anode and cathode for the electrolysis of each aqueous solution. a. Ni(NO3)2(aq) b. KCl(aq) c. CuBr2(aq)

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26 Apr 2018
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Related questions

1) A constant current of 0.800 A is run through the electrolytic cell in order to produce oxygen (gas) at the anode:

2 H2O → O2(g) + 4 e- + 4 H+

The amount (in grams) of O2 obtained after 15.2 min of electrolysis is [X] g

2) Electrolysis of a solution of Tl3+ produces deposition of elemental thallium, Tl, at the cathode. The time (in min.) needed for a constant current of 1.20 A to deposit 0.500 g of Tl(s) is [X] min.

3) An electrochemical cell is described by the following line notation:

Zn(s) ǀ Zn2+(aq) (0.0420 M) ǀǀ Tl3+(aq) (9.06×10-2 M), Tl+(aq) (0.0400 M) ǀ Pt(s).

Given: E°(Zn2+/Zn) = - 0.763 V; E°(Tl3+/Tl+) = + 1.25 V.

The potential on the cathode half-cell, E+ = V; the potential on the anode half-cell, E- = V; and the overall cell potential, Ecell = V.

4) Consider electrolysis of molten copper bromide, CuBr2. What is the product of this process obtained (a) at the cathode? (b) at the anode?

1. a) Cathode: Cu(s);
(b) Anode: Br2(l)

2. (a) Cathode: Br2(l);

(b) Anode: Cu(s)

3. (a) Cathode: Cu2+;

(b) Anode: Br-

4. (a) Cathode: Br-;

(b) Anode: Cu2+

5. (a) Cathode: Cu(s);

(b) Anode: O2(g)

6. (a) Cathode: H2(g);

(b) Anode: Cu2+

Predict the half-reaction occurring at the anode and cathode for the electrolysis ....

of a mixture of molten MgCl2(l) and MgBr2(l)

Predict the half-reaction occurring at the anode and cathode for the electrolysis NaBr(aq)

Thanks in advance!

Based on the activity series, which one of the reactions below willoccur?

a. Mn (s) + NiCl2 (aq) ? MnCl2 (aq) + Ni (s)
b. Fe (s) + ZnCl2 (aq) ? FeCl2 (aq) + Zn (s)
c. SnBr2 (aq) + Cu (s) ? CuBr2 (aq) + Sn (s)
d. Pb (s) + NiI2 (aq) ? PbI2 (aq) + Ni (s)
e. None of the reactions will occur.

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