Question

Give the balanced equation for the following: Dehydration of concentrated sulphuric acid with sugar crystal.

Answer 1

1. Dehydration: It is the process of removal of ${\mathrm{H}}_2\mathrm{O}$ from the reactant side of the molecules in a chemical reaction.
2. $\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4$ is a good dehydrating compound.
3. $\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4$ when added to ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$, it removes the $\mathrm{H}\mathrm{and}\mathrm{O}$ atoms from the sugar molecule in the ratio $2˸1$
4. $$\begin{gathered} {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\left(\mathrm{s}\right)\stackrel{\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }6\mathrm{C}\left(\mathrm{s}\right)+6{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right) \\ \mathrm{Glucose}\stackrel{\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }\mathrm{carbon}+\mathrm{water} \end{gathered}$$