Question

To dissolve 0.9 g metal, 100 mL of $1NHCl$ is used. What is the equivalent weight of metal?

• A. 7
• B. 9
• C. 10
• D. 6

Answer 1

Answer: (B)

$1NHCl$ solution means; 36.5 g of $HCl$ are dissolved in 1000 mL. ( $\because$ Equivalent wt. of $HCl=36.5$ ) $\therefore$ 100 mL of $HCl$ solution contains $HCl$ Similarly 100 mL of $HCl$ solution contains Now, $\frac{Eq.wt.ofmetal}{Weightofmetalinsolution}$ $=\frac{Eq.wt.ofacid}{Weightofacidinsolution}$ $\frac{E}{0.9}=\frac{36.5}{3.65}$ $E=9$