Question

20g of a monobasic acid furnishes 0.5 moles of $H_3{O}^{+}$ ions in its aqueous solution. The value of 1g eq. of the acid will be:

• A. $40g$
• B. $20g$
• C. $10g$
• D. $100g$

Answer 1

Answer: (A)

$40g$

0.5 moles of $H_3{O}^{+}$ ion are furnished by 20g of acid

so, 1 mole of $H_3{O}^{+}$ ions furnished by 40 g

so, 1g eq. of acid become equal to 40g.