$R T$

$\frac{1}{(R T)^2}$

$\frac{1}{\sqrt{R T}}$

1

lime - soda process

permutit process

ion - exchange process

boiling followed by filtration

$\mathrm{K}^{+}+\mathrm{OH}^{-}+\mathrm{O}_2$

$\mathrm{K}^{+}+\mathrm{K}_2 \mathrm{O}+\mathrm{O}_2+\mathrm{OH}^{-}$

$\mathrm{K}^{+}+\mathrm{H}_2 \mathrm{O}_2+\mathrm{O}_2+\mathrm{OH}^{-}$

$\mathrm{K}^{+}+\mathrm{H}_2 \mathrm{O}_2+\mathrm{OH}^{-}$