Question

The hydride ion H– is a stronger base than its hydroxide ion OH–. Which of the following reactions will occur if sodium hydride (NaH) is dissolved in water?

• A. H–(aq) + H2O $\longrightarrow$ H3O–(aq)
• B. H–(aq) + H2O(l) $\longrightarrow$ OH–(aq) + H2(g)
• C. H–(aq) + H2O(l) $\longrightarrow$ No reaction
• D. None of these.

Answer 1

Answer: (B)

H–(aq) + H2O(l) $\longrightarrow$ OH–(aq) + H2(g)

Answer 2

CaH2 + 2H2O $\longrightarrow$2H2 + Ca (OH)2