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Question: Answered & Verified by Expert
$0.5 \mathrm{~g}$ of an acid is neutralised by $40 \mathrm{cc}$ of $0.125 \mathrm{~N} \mathrm{NaOH}$. The equivalent mass of the acid is
ChemistryRedox ReactionsJEE Main
Options:
  • A 50
  • B 100
  • C 40
  • D 80
Solution:
2520 Upvotes Verified Answer
The correct answer is: 100
Equivalent moles of $\mathrm{NaOH}=$ Equivalent moles of acid
$N_{1} V_{1}=\frac{\text { Weight }}{\text { Equivalent mass }}$ $40 \times 10^{-3} \times 0.125=\frac{0.5}{\text { Equivalent mass }}$ $\therefore$ Equivalent mass of acid $=100$

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