Question

Write a balanced equation for the reaction of each of the following compounds with water: (a) ${\mathrm{SO}}_2(g)$, (b) ${\mathrm{Cl}}_2{\mathrm{O}}_7(g)$, (c) ${\mathrm{Na}}_2{\mathrm{O}}_2(s)$, (d) ${\mathrm{BaC}}_2$ (s), (e) ${\mathrm{RbO}}_2$ (s) (f) ${\mathrm{Mg}}_3{\mathrm{N}}_2(s)$, (g) $\mathrm{NaH}($ s).

Short answer

(a) ${\mathrm{SO}}_2(g)+{\mathrm{H}}_2\mathrm{O}(l)\to {\mathrm{H}}_2{\mathrm{SO}}_3(aq)$ (b) ${\mathrm{Cl}}_2{\mathrm{O}}_7(g)+{\mathrm{H}}_2\mathrm{O}(l)\to 2{\mathrm{HClO}}_4(aq)$ (c) ${\mathrm{Na}}_2{\mathrm{O}}_2(s)+2{\mathrm{H}}_2\mathrm{O}(l)\to 2\mathrm{NaOH}(aq)+{\mathrm{H}}_2{\mathrm{O}}_2(aq)$ (d) ${\mathrm{BaC}}_2(s)+2{\mathrm{H}}_2\mathrm{O}(l)\to {\mathrm{Ba}(\mathrm{OH})}_2(aq)+{\mathrm{C}}_2{\mathrm{H}}_2(g)$ (e) ${\mathrm{RbO}}_2(s)+2{\mathrm{H}}_2\mathrm{O}(l)\to 2\mathrm{RbOH}(aq)+{\mathrm{H}}_2{\mathrm{O}}_2(l)$ (f) ${\mathrm{Mg}}_3{\mathrm{N}}_2(s)+6{\mathrm{H}}_2\mathrm{O}(l)\to 3{\mathrm{Mg}(\mathrm{OH})}_2(s)+2{\mathrm{NH}}_3(g)$ (g) $\mathrm{NaH}(s)+{\mathrm{H}}_2\mathrm{O}(l)\to \mathrm{NaOH}(aq)+{\mathrm{H}}_2(g)$

Step-by-step solution

Identify the type of reaction

This is an acid-base reaction, as sulfur dioxide dissolves in water to form an acidic solution.

Write the balanced equation

The balanced chemical equation is: ${\mathrm{SO}}_2(g)+{\mathrm{H}}_2\mathrm{O}(l)\to {\mathrm{H}}_2{\mathrm{SO}}_3(aq)$ (b) Reaction of ${\mathrm{Cl}}_2{\mathrm{O}}_7(g)$ with water

Identify the type of reaction

This is an acid-base reaction, where chlorine heptoxide reacts with water to form an acidic solution.

Write the balanced equation

The balanced chemical equation is: ${\mathrm{Cl}}_2{\mathrm{O}}_7(g)+{\mathrm{H}}_2\mathrm{O}(l)\to 2{\mathrm{HClO}}_4(aq)$ (c) Reaction of ${\mathrm{Na}}_2{\mathrm{O}}_2(s)$ with water

Identify the type of reaction

This is an acid-base reaction, as sodium peroxide reacts with water to form an alkaline solution.

Write the balanced equation

The balanced chemical equation is: ${\mathrm{Na}}_2{\mathrm{O}}_2(s)+2{\mathrm{H}}_2\mathrm{O}(l)\to 2\mathrm{NaOH}(aq)+{\mathrm{H}}_2{\mathrm{O}}_2(aq)$ (d) Reaction of ${\mathrm{BaC}}_2(s)$ with water

Identify the type of reaction

This is a hydrolysis reaction, where water reacts with barium carbide to produce calcium hydroxide and acetylene gas.

Write the balanced equation

The balanced chemical equation is: ${\mathrm{BaC}}_2(s)+2{\mathrm{H}}_2\mathrm{O}(l)\to {\mathrm{Ba}(\mathrm{OH})}_2(aq)+{\mathrm{C}}_2{\mathrm{H}}_2(g)$ (e) Reaction of ${\mathrm{RbO}}_2(s)$ with water

Identify the type of reaction

This is an acid-base reaction, as rubidium superoxide reacts with water to form alkali and hydrogen peroxide.

Write the balanced equation

The balanced chemical equation is: ${\mathrm{RbO}}_2(s)+2{\mathrm{H}}_2\mathrm{O}(l)\to 2\mathrm{RbOH}(aq)+{\mathrm{H}}_2{\mathrm{O}}_2(l)$ (f) Reaction of ${\mathrm{Mg}}_3{\mathrm{N}}_2(s)$ with water

Identify the type of reaction

This is a hydrolysis reaction, where magnesium nitride reacts with water to produce magnesium hydroxide and ammonia.

Write the balanced equation

The balanced chemical equation is: ${\mathrm{Mg}}_3{\mathrm{N}}_2(s)+6{\mathrm{H}}_2\mathrm{O}(l)\to 3{\mathrm{Mg}(\mathrm{OH})}_2(s)+2{\mathrm{NH}}_3(g)$ (g) Reaction of $\mathrm{NaH}(s)$ with water

Identify the type of reaction

This is an acid-base reaction, as sodium hydride reacts with water to produce sodium hydroxide and hydrogen gas.

Write the balanced equation

The balanced chemical equation is: $\mathrm{NaH}(s)+{\mathrm{H}}_2\mathrm{O}(l)\to \mathrm{NaOH}(aq)+{\mathrm{H}}_2(g)$