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Explain why is sodium less reactive than...

Explain why is sodium less reactive than potassium.

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This is mainly due to higer ionisation enthalpy `(Delta_(i)H_(l)=496kJ mol^(-1))` of sodiumas comared to postassium `(Delta_(i)H_(l)=419kJ mol^(-1))`. As a result,the potassium is more electropositive and stronger reducing agent the sodium. It also reacts with water more violently than sodium. Thus, sodium is less reactive than potassium.
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