Question

Write balanced equations for reactions between
(a) Na2O2 and water
(b) KO2 and water
(c) Na2O and CO2.
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Answer 1

Answer:

a) The balanced equations for reactions between Na2O2 and water is given below:

Na2O2 (s) + 2H2O (l) → 2NaOH (aq) + H2O2 (aq)

b) The balanced equations for reactions between KO2 and water is given below:

2KO2 (s) + 2H2O (l) → 2KOH (aq) + H2O2 (aq) + O2 (g)

c) The balanced equations for reactions between Na2O and CO2.is given below:

Na2O + CO2→ Na2CO3

Answer 2

Explanation:

fgiolkkThe hydroxides and carbonates of sodium and potassium are easily soluble in water while the corresponding salts of magnesium and calcium are sparingly soluble in water.

Explanation:

⇒ Due to larger size of Na and K as compared to that of magnesium and calcium, the lattice energies of hydroxides and carbonates of sodium and potassium are much lower than those of hydroxides and carbonates of magnesium and calcium.

⇒ As a result, the hydroxides of Na and K are easily soluble in water while that of corresponding salts of magnesium and calcium are sparingly soluble in water.