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Standard X

Chemistry

Mole Concept and Avogadro's Number

Calculate the...

Question

Calculate the heat of neutralization by mixing $200 m L$ of $0.1 M$ $H_{2} S O_{4}$ and $200 m L$ of $0.2 M$ $K O H$ if heat generated by mixing is $2.3 k J$ .

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Solution

Meq. of $H_{2} S O_{4} = 200 \times 0.1 \times 2 = 40$ ( $H_{2} S O_{4}$ is dibasic)
Meq. of $K O H$ $=$ $200 \times 0.2 = 40$

$∵ 40 M e q .$ of $H_{2} S O_{4}$ and $40 M e q .$ of $K O H$ on mixing gives heat

$= 2.3 k J$

$∵ 1000 M e q .$ of $H_{2} S O_{4}$ and $1000 M e q .$ of $K O H$ on mixing gives heat

$= \frac{2.3 \times 1000}{40} = 57.5 k J$

$= 57.5 k J$

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