Electrochemistry

Practice Questions

Physical Chemistry › Electrochemistry

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1

Oxidation reactions __________ electrons and reduction reactions __________ electrons.

2

Oxidation reactions __________ electrons and reduction reactions __________ electrons.

3

Lithium batteries consist of lithium compounds and manganese dioxide. The reduction potential for lithium is , whereas the reduction potential for manganese dioxide is . Which of the following reaction(s) occur(s) when a lithium battery is discharging?

I. Oxidation of manganese

II. Reduction of lithium

III. Oxidation of lithium

4

Lithium batteries consist of lithium compounds and manganese dioxide. The reduction potential for lithium is , whereas the reduction potential for manganese dioxide is . Which of the following reaction(s) occur(s) when a lithium battery is discharging?

I. Oxidation of manganese

II. Reduction of lithium

III. Oxidation of lithium

5

Which of the following reactions involves both reduction and oxidation reactions?

6

Which of the following reactions involves both reduction and oxidation reactions?

7

$Ag^{+}+e^{-}\rightarrow Ag$

$1 A \equiv1\frac{C}{S}$

$1:mol:e^{-}=96500:C$

A current is passed through a silver ion solution. How much silver is deposited after 10 minutes?

$Ag=107.9 \frac{g}{mol}$

8

$Ag^{+}+e^{-}\rightarrow Ag$

$1 A \equiv1\frac{C}{S}$

$1:mol:e^{-}=96500:C$

A current is passed through a silver ion solution. How much silver is deposited after 10 minutes?

$Ag=107.9 \frac{g}{mol}$

9

$Na^{+}+e^{-}\rightarrow Na$ $E\degree=-2.71V$

$Mn^{2+}+2e^{-}\rightarrow Mn$ $E\degree=-1.18V$

For an electrolytic cell containing the two half-cells shown, the __________ reaction will take place and the $E_{cell}\degree$ will be __________.

10

$Na^{+}+e^{-}\rightarrow Na$ $E\degree=-2.71V$

$Mn^{2+}+2e^{-}\rightarrow Mn$ $E\degree=-1.18V$

For an electrolytic cell containing the two half-cells shown, the __________ reaction will take place and the $E_{cell}\degree$ will be __________.

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