$\mathrm{Mg}\left(\mathrm{NO}_3\right)_2 \cdot \mathrm{XH}_2 \mathrm{O}$ and $\mathrm{Ba}\left(\mathrm{NO}_3\right)_2 \cdot \mathrm{YH}_2 \mathrm{O}$, represent formula of the crystalline forms of nitrate salts. Sum of $X$ and $Y$ is $\_\_\_\_$
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Solution
$\mathrm{Mg}\left(\mathrm{NO}_3\right)_2 \cdot 6 \mathrm{H}_2 \mathrm{O}$ is a hydrated salt whereas $\mathrm{Ba}\left(\mathrm{NO}_3\right)_2$ is a anhydrous salt.
$$
\therefore x+y=6
$$
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