$N=14,Na=23,S=32,C=12,Ca=40,Mg=24\mathrm{.}3,Fe=55\mathrm{.}8,H=1,O=16,Cl=35\mathrm{.}5,K=39\mathrm{.}1$

CHEMICAL REQUIREMENTS FOR WATER SOFTENING WITH LIME AND SODA ASH

A water having the analysis given below is to be softened by the excess$-$lime$-$soda$-$ash method $($normal method$).$

Determine:

Water hardness $($in $m\frac{g}{L}$ or $\frac{g}{m^3}$ as $CaC{O}_3)$

Alkalinity $($in $m\frac{g}{L}$ or $\frac{g}{m^3}$ as $CaC{O}_3)$

The amount of lime and soda ash required $(g)$ per cubic meter of water treated.

$\backslash$table$[[$CONSTITUENT$,$CONCENTRATION, $m\frac{g}{L}(\frac{\text{o}\text{r}\text{g}}{m^3})$