The neutralization occurs when 10 mL of 0.1 M acid 'A' is allowed to react with 30 mL of 0.05 M base $\mathrm{M}(\mathrm{OH})_{2}$. The basicity of the acid 'A' is ______. [M is a metal]

JEE Main · 2022 · 25 Jun 2022 · Shift 2 · Equilibrium

The neutralization occurs when 10 mL of 0.1 M acid 'A' is allowed to react with 30 mL of 0.05 M base

M (OH)_{2}

. The basicity of the acid 'A' is ______. [M is a metal]

Answer: 3

At the equivalence point, the number of equivalents of acid equals the number of equivalents of base.

For the base

M (OH)_{2}

, n-factor = 2 (two OH⁻ groups).

Equivalents of acid = Equivalents of base:

0.1 \times 10 \times n = 0.05 \times 30 \times 2

1.0 \times n = 3.0

n = 3

The basicity (number of replaceable H⁺ ions) of acid A is 3.

JEE Main · 2022 · 25 Jun 2022 · Shift 2 · Integer answer