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Q.

An equimolar mixture of ferrous oxalate & stannous chloride is treated with decinormal acidic KMnO₄giving ferric, stannic & chlorate ions along with CO₂ gas. If the titre value is 225 ml. Numbers of millimoles of chlorate ions produced are

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a

2.64 m moles

b

1.5 m moles

c

3 m moles

d

7.5 m moles

answer is D.

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Detailed Solution

Let millimoles of FeC₂ O₄ =SnCl₂ = x
n -factor of FeC₂ O₄ =3
n - factor of SnCl₂ = 14 $∴ 3 x + 14 x = 0.1 \times 225$
$\Rightarrow 17 x = 22 .5 \Rightarrow x = \frac{22 .5}{17}$
m.moles of ${ClO}_{3}^{-} formed = \frac{22.5}{17} \times 2 = 2.64$

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An equimolar mixture of ferrous oxalate & stannous chloride is treated with decinormal acidic KMnO4 giving ferric, stannic & chlorate ions along with CO2 gas. If the titre value is 225 ml. Numbers of millimoles of chlorate ions produced are