Q14 / 160 · TS EAMCET 2019 (06 May Shift 1) · Chemistry

How many water molecules present in $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ are hydrogen bonded?

  • A
    $5$
  • Correct answer
    B
    $1$
  • C
    $4$
  • D
    $2$

Solution

$\mathrm{The} \mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ contain five molecules as water of crystallisation by each $\mathrm{CuSO}_4$ molecule. Out of $5 \mathrm{H}_2 \mathrm{O}$ molecules, $4 \mathrm{H}_2 \mathrm{O}$ molecules are bonded with the $\mathrm{CuSO}_4$, (i.c. with $\mathrm{Cu}^{2+}$ ) through coordinate bonds while one of the $\mathrm{H}_2 \mathrm{O}$ molecule is bonded through $\mathrm{H}$ - bond. Figure
Stucture of $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ Hence, option (b) is the correct answer.

Hence, the correct answer is option: 'B'.

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