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QJEEM23Ch42b1: JEE Main 2023 Chemistry - Class 11 JEEM23Ch42b1 Solution: is titrated with ferrous ammonium sulphate hexahydrate in…

KMnO4\mathrm{KMnO}_{4} is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute H2SO4\mathrm{H}_{2} \mathrm{SO}_{4} . Number of water molecules produced for 2 molecules of KMnO4\mathrm{KMnO}_{4} is ___________.

Step-by-Step Verified Solution

The balanced redox equation considering the ferrous ammonium sulfate hexahydrate is as follows:

10[FeSO4⋅(NH4)2SO4⋅6H2O]+2KMnO4+8H2SO4→10\left[\mathrm{FeSO}_4 \cdot\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}\right]+2 \mathrm{KMnO}_4+8 \mathrm{H}_2 \mathrm{SO}_4 \rightarrow

      5Fe2(SO4)3+2MnSO4+10(NH4)2SO4+K2SO4+68H2O5 \mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3+2 \mathrm{MnSO}_4+10\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4+\mathrm{K}_2 \mathrm{SO}_4+68 \mathrm{H}_2 \mathrm{O}

Now, we are asked to find the number of water molecules produced for 2 molecules of KMnO₄.

From the balanced equation, we can observe that 2 moles of KMnO₄ produce 68 moles of H₂O. Therefore, for 2 molecules of KMnO₄, the number of water molecules produced will be:

2 molecules × 34 water molecules per molecule of KMnO₄ = 68 water molecules

So, 68 water molecules are produced for 2 molecules of KMnO₄ in this titration.

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