Question

1.25g of an acid is completely neutralized by 25 mL of a 0.25 M Ba(OH), solution. Which of the following
statement(s) is (are) correct?
(As if the acid is dibasic, its molar mass would be 200
B) If the acid is monobasic, its molar mass would be 400
(C) 0.50 g of the same acid would neutralize completely 12.5 mL of a 0.40 M NaOH solution​

Answer 1

Answer:

The correct answer is option A

Explanation:

As we know,

$\mathrm{M}=\frac{\mathrm{W}_{(\mathrm{gm})} \times 1000}{\mathrm{~V}_{(\mathrm{mL})} \times \mathrm{m}_{(\mathrm{gm})}}$

whereas,

$\begin{aligned}&\mathrm{W}=\text { wt. of solute }=1.25 \mathrm{~g} \\&\mathrm{~V}=\text { Volume of solvent }=25 \mathrm{~mL} \\&\mathrm{M}=\text { Molarity of solvent }=0.25 \mathrm{M} \\&\mathrm{m}=\text { mol. wt. of solute }=\text { ? } \\&\therefore 0.25=\frac{1.25 \times 1000}{25 \times \mathrm{m}} \\&\Rightarrow \mathrm{m}=200 \mathrm{gm}\end{aligned}$

Hence the molecular mass of acid is 200 gm.