In order to remove $M{g}^{\mathit{2}\mathit{+}}$ and ${\mathrm{Ca}}^{+2}$ from ${\mathrm{H}}_2\mathrm{O}$, impure water is treated with sodium tripolyphosphate $\left({\mathrm{Na}}_5{\mathrm{P}}_3{\mathrm{O}}_{10}\right)$ (MW = 368) where following sequential reactions takes place:

$\begin{array}{l}{\mathrm{Na}}_5{\mathrm{P}}_3{\mathrm{O}}_{10}+{\mathrm{Mg}}^{+2}⟶{\mathrm{Na}}_3{\mathrm{MgP}}_3{\mathrm{O}}_{10}+2{\mathrm{Na}}^{+}\\ {\mathrm{Na}}_3{\mathrm{MgP}}_3{\mathrm{O}}_{10}+{\mathrm{Ca}}^{+2}⟶{\mathrm{NaCaMgP}}_3{\mathrm{O}}_{10}+2{\mathrm{Na}}^{+}\end{array}$

Select the correct statement about treatment of $10 \mathrm{L} {\mathrm{H}}_2\mathrm{O}$ having 48ppm of${\mathrm{Mg}}^{+2}$and 40ppm of ${\mathrm{Ca}}^{+2}$.