Will award points for answers. Just want to compare mine with the experts In a v

ID: 831030 • Letter: W

Question

Will award points for answers. Just want to compare mine with the experts

In a voltaic cell, the positive electrode is called the:

cathode, at which reduction occurs

anode, at which reduction occurs

cathode, at which oxidation occurs

anode, at which oxidation occurs

Question 10

The half reaction representing the reduction in the following reaction is:

Zn(s) + 2 HCl(aq) --> ZnCl2(aq) + H2(g)

2 H+(aq) + 2e- ? H2(g)

Zn(s) ? Zn2+ + 2e-

2H+ ? H2(g) + 2e-

Zn(s) + 2e- ? Zn2+(aq)

Question 11

To balance the following redox reaction in an acidic medium, the smallest stoichiometric coefficient for H2S would be:

H2S + MnO4- ? Mn2+ + SO42-

Question 12

To balance the following reaction, the stoichiometric coefficients must be (keep order from equation):

Fe2+ + MnO4- + H+ ? Fe3+ + Mn2+ + H2O

1, 2, 1, 2, 1, 2

5, 1, 1, 5, 1, 2

5, 1, 8, 5, 1, 4

8, 1, 5, 2, 1, 4

cathode, at which reduction occurs

anode, at which reduction occurs

cathode, at which oxidation occurs

anode, at which oxidation occurs

1.anode, at which oxidation occurs

2.Zn(s) ? Zn2+ + 2e-

3.5

4.5, 1, 8, 5, 1, 4

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