Chemistry - Salt Analysis Question with Solution | TestHub

Question Explanation:

Identification of a salt based on heating and flame tests.

Concept: Analysis of Alum

Solution:

Alum swells on heating to form "burnt alum". Sodium alum gives a golden yellow flame test due to ${\mathrm{Na}}^{+}$.

${\mathrm{Na}}_2{\mathrm{SO}}_4\mathrm{Al}{\left({\mathrm{SO}}_4\right)}_5\cdot 24{\mathrm{H}}_2\mathrm{O}\stackrel{\mathrm{D}}{\to }{\mathrm{Na}}_2{\mathrm{SO}}_4+{\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$

Final Answer: All of these