Question

Complete the following reactions:

$\mathrm{Zn}+\mathrm{KOH}\stackrel{}{\to }----$

Answer 1

Reaction of zinc with potassium hydroxide:

• When zinc reacts with hot and concentrated potassium hydroxide$\left(\mathrm{KOH}\right)$ to give potassium zincate($\left({\mathrm{K}}_2{\mathrm{ZnO}}_2\right)$ and liberate hydrogen gas$\left({\mathrm{H}}_2\right)$.
• $\underset{\mathrm{zinc}}{\mathrm{Zn}}+\underset{\mathrm{hot}\mathrm{and}\mathrm{conc}}{2\mathrm{KOH}}\stackrel{}{\to }\underset{\mathrm{potassium}\mathrm{zincate}}{{\mathrm{K}}_2{\mathrm{ZnO}}_2}+\underset{\mathrm{hydrogen}\mathrm{gas}}{{\mathrm{H}}_2}$