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BITSAT 2013

Exam: BITSAT
Year: 2013
Subject: Chemistry
Chapter: Redox Reactions

BITSAT 2013 · Chemistry · Redox Reactions

Volume of 3 \% solution of sodium carbonate necessary to neutralise...

Volume of

3 \%

solution of sodium carbonate necessary to neutralise a litre of

0.1 \mathrm{ N}

sulphuric acid

Options

A $176.66 \mathrm{ml}$
B $156.6 \mathrm{ml}$
C $116.0 \mathrm{ml}$
D $196.1 \mathrm{ml}$

Correct answer

A. $176.66 \mathrm{ml}$

Step-by-step solution

Normality of

3 \% \mathrm{Na}_{2} \mathrm{CO}_{3}\mathrm{N}=\frac{3 \times 1000}{53 \times 100}=0.566 \mathrm{ N}

For

\mathrm{H}_{2} \mathrm{SO}_{4}

sol.

\mathrm{N}_{1}=0.1, \mathrm{ V}_{1}=100 \mathrm{ mL}

For

\mathrm{Na}_{2} \mathrm{CO}_{3}

sol.

\mathrm{N}_{2}=0.566

Now apply

\mathrm{N}_{1} \mathrm{ V}_{1}=\mathrm{N}_{2} \mathrm{ V}_{2}\mathrm{V}_{2}=\frac{\mathrm{N}_{1} \mathrm{ V}_{1}}{\mathrm{ N}_{2}}=\frac{0.1 \times 1000 \mathrm{ mL}}{0.566}=176.66 \mathrm{ mL}

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