What is the quantity of dehydrated water when $34.2 \mathrm{~g}$ cane sugar is treated with conc.…

What is the quantity of dehydrated water when $34.2 \mathrm{~g}$ cane sugar is treated with conc. $\mathrm{H}_2 \mathrm{SO}_4$ under normal conditions of temperature and pressure?
  1. $11.0 \mathrm{~g}$
  2. $19.8 \mathrm{~g}$
  3. $39.6 \mathrm{~g}$
  4. $34.2 \mathrm{~g}$

Solution

$\begin{aligned} & \mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11} \stackrel{\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4}{\longrightarrow} 12 \mathrm{C}+11 \mathrm{H}_2 \mathrm{O} \\ & \begin{aligned} 1.1 \mathrm{~mol}\end{aligned} \\ & 1.1 \mathrm{~mol} \mathrm{H}_2 \mathrm{O}=1.1 \times 18 \\ &=19.8 \mathrm{~g}\end{aligned}$

Asked in: MHT CET 2022 (10 Aug Shift 1)

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