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NCERT Class XI Chemistry The s-Block Elements Solutions

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Question : 28 of 32
Marks: +1, -0
Write balanced equations for reactions between
(a) Na2O2Na_2O_2 and water
(b) KO2KO_2 and water
(c) Na2ONa_2O and CO2CO_2.
Solution:  
(a) Na2O2+2H2ONa_2O_2 + 2H_2O → 2NaOH + H2O2H_2O_2
(b) 2KO2+2H2O2KO_2 + 2H_2O → 2KOH + H2O2+O2H_2O_2 + O_2
or 4KO2(s)+2H2O(l)4KO_{2(s)} + 2H_2O_(l) → 4KOH(aq)+3O2(g)4 KOH_(aq) + 3O_{2(g)}
(c) Na2O+CO2Na_2O + CO_2 → Na2CO3Na_2CO_3
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