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The molecular formula of potash alum is
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1932 Upvotes
Verified Answer
The correct answer is:
$\mathrm{K}_2 \mathrm{Al}_2 \mathrm{~S}_4 \mathrm{H}_{48} \mathrm{O}_{40}$
The composition of potash alum is
or
$$
\mathrm{K}_2 \mathrm{SO}_4 \cdot \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3 \cdot 24 \mathrm{H}_2 \mathrm{O}
$$
$$
\mathrm{K}_2 \mathrm{Al}_2 \mathrm{~S}_4 \mathrm{H}_{48} \mathrm{O}_{40}
$$
It is a double salt of potassium sulphate and aluminium sulphate.
or
$$
\mathrm{K}_2 \mathrm{SO}_4 \cdot \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3 \cdot 24 \mathrm{H}_2 \mathrm{O}
$$
$$
\mathrm{K}_2 \mathrm{Al}_2 \mathrm{~S}_4 \mathrm{H}_{48} \mathrm{O}_{40}
$$
It is a double salt of potassium sulphate and aluminium sulphate.
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