A) 20 mL
B) 30 mL
C) 40 mL
D) 50 mL
Correct Answer: C
Solution :
\[{{H}_{3}}P{{O}_{3}}\]is a dibasic acid. \[{{N}_{1}}{{V}_{1}}(acid)={{N}_{2}}{{V}_{2}}(base)\] \[0.1\times 2\times 20=0.1\times 1\times {{V}_{2}}\] \[{{V}_{2}}=\frac{0.1\times 2\times 20}{0.1\times 1}\] \[=40\,mL\]
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