Oxidation State Worksheet
Oxidation State Worksheet
In each of the following chemicals, determine the oxidation states of each element:
1) sodium nitrate ____________________________________
2) ammonia ____________________________________
3) zinc oxide ____________________________________
4) water ____________________________________
5) calcium hydride ____________________________________
6) carbon dioxide ____________________________________
7) nitrogen ____________________________________
8) sodium sulfate ____________________________________
9) aluminum hydroxide ____________________________________
10) magnesium phosphate ____________________________________
In each of the following reactions, determine what was oxidized and what was reduced.
11) Ca + H2O ( CaO + H2
Element oxidized: ____________________________________
Element reduced: ____________________________________
12) 2 H2 + O2 ( 2 H2O
Element oxidized: ____________________________________
Element reduced: ____________________________________
Oxidation State Worksheet – Solutions
In each of the following chemicals, determine the oxidation states of each element:
1) sodium nitrate: Na, +1; N, +5; O, -2
2) ammonia: N, -3; H, +1
3) zinc oxide: Zn, +2: O, -2
4) water: H, +1; O, -2
5) calcium hydride: H, -1; Ca, +2
6) carbon dioxide: C, +4; O, -2
7) nitrogen: N, 0
8) sodium sulfate: Na, +1; S, +6; O, -2
9) aluminum hydroxide: Al, +3; H, +1; O, -2
10) magnesium phosphate: Mg, +2; P, +5; O, -2
In each of the following reactions, determine what was oxidized and what was reduced.
11) Ca + H2O ( CaO + H2
Element oxidized: calcium, from 0 to +2
Element reduced: hydrogen, from +1 to 0
12) 2 H2 + O2 ( 2 H2O
Element oxidized: hydrogen, from 0 to +1
Element reduced: oxygen, from 0 to -2
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