Oxidation State

Practice Questions

AP Chemistry › Oxidation State

Questions

7

1

When is the oxidation number of H (-1)?

2

What is the oxidation number of manganese in ?

3

The Claus process is used in the petroleum industry to convert sulfur containing gases into solid (rhombic) sulfur. One of the reactions that takes place in this process is:

$16H_{2}S; +; ; 8SO_{2}; \rightarrow 3{S_{8}}; +; 16H_{2}O$

Which of the following statements is correct:

4

What is the oxidation number of Cr, S, and Fe in the following substances: (a) K2Cr2O7 (b) H2SO4 (c) Fe2O3.

5

Consider the following balanced equation:

$2Al_{(s)}+3H_2SO_{4\hspace{1 mm}(aq)}\rightarrow Al_2(SO_4){3\hspace{1 mm}(aq)}+\hspace{1 mm}H{2\hspace{1 mm}(g)}$

What is the difference between the oxidation state of aluminum on the right side of the equation versus the left?

6

What is the oxidation number of chlorine in perchlorate?

7

$Fe_{2}O_{3}+2Al \rightarrow Al_{2}O_{3}+2Fe$

In the above reaction, what are the initial and final oxidation states of ?

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