CCU8 Ox number and 1/2 reactions

Multiple Choice

What is the oxidation number of O in elemental O₂ ?

• 0

• -2

• +1

• +2

Multiple Choice

What is the oxidation number of Sn in SnO₂?

• +1
• +4
• +2
• -2

Multiple Choice

What is the oxidation number of Ca in Ca₃N₂?

• +3
• +2
• -3
• -2

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Determine the Oxidation numbers

H2O --> H:​

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O:​

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OH- --> H:​

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O:​

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In SO₂

Sulfur has an oxidation `number of ​

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and oxygen has an oxidation number of ​

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​

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​

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--> ​

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​

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 Cl_{2 (g)}   +    Na _(s)     →    Na⁺ _(aq) +   Cl^- _(aq)