Chemistry · May / June 2017 · Paper 22 · Question A4
5070
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The question as text
A4 Sodium oxide, Na2O, is an ionic compound.
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A4(a)[2]
A4(b)[2]
negative electrode: Na⁺ + e⁻ → Na;
positive electrode: 2O²⁻ → O2 + 4e⁻
A4(c)[1]
ions move / mobile ions / ions free to move
A4(d)[1]
Na2O + H2O → 2NaOH
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