Question

If $1\, gm$ of propionic anhydride is introduced quantitatively into water, calculate the volume of $0.5\, N$ alkali required for neutralisation of the solution?

• A. $30.8 \,ml$
• B. $44.4\, ml$
• C. $61.6 \,ml$
• D. $50 \,ml$

Answer 1

Answer: (B)

$1\, mol (130 gm )=2\, mol$
$1 \,gm =\frac{2}{130}$ mol or eq.
Number of equivalent of acid $=$ Number of equivalent of base
$\frac{2}{130} \times 1000 \,mEq =0.5 \times V$
$\therefore V=44.4\, ml$