Question

Complete the following reaction:

$\mathrm{Zn}+\mathrm{NaOH}\to$

Answer 1

• Zinc and Aluminium are amphoteric metals as they react with both acids and bases.
• Zinc is an example of a transition metal that demonstrates mild reactivity.
• Since zinc$\left(\mathrm{Zn}\right)$ is amphoteric, it interacts with the evolution of hydrogen gas$\left({\mathrm{H}}_2\right)$ to form Sodium zincate$\left({\mathrm{Na}}_2{\mathrm{ZnO}}_2\right)$ with Sodium hydroxide$\left(\mathrm{NaOH}\right)$.
• At a temperature near 550 °C, these reactions occur.
• This reaction is an example of an endothermic reaction.
• $\underset{\mathrm{Zinc}}{\mathrm{Zn}\left(\mathrm{s}\right)}+\underset{\mathrm{Sodium}\mathrm{Hydroxide}}{\mathrm{NaOH}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Sodium}\mathrm{Zincate}}{{\mathrm{Na}}_2{\mathrm{ZnO}}_2\left(\mathrm{s}\right)}+\underset{\mathrm{Hydrogan}\mathrm{gas}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}$