Question

Assertion :In the titration of $N{a}_{2}C{O}_3$ with $HCl$ using methyl orange indicator, the volume required at the equivalence point is twice that of the acid required using phenolphthalein indicator. Reason: $2$ mol of $HCl$ am required for complete neutralization of one mol of $N{a}_{2}C{O}_3$.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Equivalents of $N{a}_{2}C{O}_3=$ Equivalents of $HCl$

So, in the titration of $N{a}_{2}C{O}_3$ with $HCl$ using methyl orange indicator, the volume required at the equivalence point is twice that of the acid required using phenolphthalein indicator.

$\frac{1}{2}$ mol of $N{a}_{2}C{O}_3=\frac{1}{1}$ mol of $HCl$

$1$ mol of $N{a}_{2}C{O}_3=2$ mol of $HCl$