Question

Write the balanced chemical equation for the following:

1. A mixture of soda lime and sodium acetate is heated
2. Calcium carbide to ethyne
3. Fe$\stackrel{\mathrm{A}}{\to }$ FeCl₃$\stackrel{\mathrm{B}}{\to }$FeCO₃$\stackrel{\mathrm{C}}{\to }$Fe (NO₃)₂
4. Sodium ethanoate to methane

Answer 1

a. $\underset{\mathrm{Soda}\mathrm{lime}}{\underbrace{\mathrm{NaOH}+\mathrm{CaO}}}+\underset{\mathrm{sodium}\mathrm{acetate}}{{\mathrm{CH}}_3\mathrm{COONa}}\to \underset{\mathrm{methane}}{{\mathrm{CH}}_4}+\underset{\mathrm{sodium}\mathrm{carbonate}}{{\mathrm{Na}}_2{\mathrm{CO}}_3}$

When soda lime react with sodium acetate, carboxyl group is removed.

So this reaction is called carboxylation reaction.

The product obtained is methane and sodium carbonate.

b. $\underset{\mathrm{calcium}\mathrm{carbide}}{{\mathrm{CaC}}_2}+\underset{\mathrm{water}}{2{\mathrm{H}}_2\mathrm{O}}\to \underset{\mathrm{calcium}\mathrm{hydroxide}}{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2+}\underset{\mathrm{ethyne}}{{\mathrm{C}}_2{\mathrm{H}}_2}$

When calcium carbide react with water, calcium hydroxide and ethyne (acetylene) is formed .

c. A) HCl B) Na₂CO₃ c) HNO₃

$\mathrm{Fe}\stackrel{\mathrm{HCl}}{\to }\underset{\mathrm{ferric}\mathrm{chloride}}{{\mathrm{FeCl}}_3}\stackrel{{\mathrm{Na}}_2{\mathrm{CO}}_3}{\to }\underset{\mathrm{ferrous}\mathrm{carbonate}}{\mathrm{Fe}{\mathrm{CO}}_3}\stackrel{{\mathrm{HNO}}_3}{\to }\underset{\mathrm{ferrous}\mathrm{nitrate}}{\mathrm{Fe}{\left({\mathrm{NO}}_3\right)}_2}$

d. $\underset{\mathrm{sodium}\mathrm{ethanoate}}{{\mathrm{CH}}_3\mathrm{COONa}}+\underset{\mathrm{sodium}\mathrm{hydroxide}}{\mathrm{NaOH}}\to \underset{\mathrm{sodium}\mathrm{carbonate}}{{\mathrm{Na}}_2{\mathrm{CO}}_3}+\underset{\mathrm{methane}}{{\mathrm{CH}}_4}$

Sodium ethanoate react with sodium hydroxide, sodium carbonate and methane is formed.