How do potassium and sodium react with oxygen? – InterviewSolution

1.

How do potassium and sodium react with oxygen?

Answer»

a) Potassium and sodium form oxides of type M₂O in limited supply of oxygen.

4 K + O₂ → 2 K₂O

4 Na + O₂ → 2 Na₂O

b) In excess of oxygen they form peroxides of type M₂O₂.

2 Na + O₂ → Na₂O₂

2 K + O₂ → K₂O₂

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