MHT CET · Chemistry · Ionic Equilibrium
Dissociation constant and degree of dissociation of weak acid are \(1.8 \times 10^{-5}\) and 0.03 respectively. What will be the concentration of solution of weak acid?
- A 0.2 M
- B 0.02 M
- C 0.5 M
- D 0.05 M
Answer & Solution
Correct Answer
(B) 0.02 M
Step-by-step Solution
Detailed explanation
\(\mathrm{K}_{\mathrm{a}}=\alpha^2 \mathrm{c} \)
\( \therefore \mathrm{c}=\frac{\mathrm{K}_{\mathrm{a}}}{\alpha^2}=\frac{1.8 \times 10^{-5}}{(0.03)^2}=\frac{1.8 \times 10^{-5}}{9 \times 10^{-4}}\) \(=0.02 \mathrm{M}\)
\( \therefore \mathrm{c}=\frac{\mathrm{K}_{\mathrm{a}}}{\alpha^2}=\frac{1.8 \times 10^{-5}}{(0.03)^2}=\frac{1.8 \times 10^{-5}}{9 \times 10^{-4}}\) \(=0.02 \mathrm{M}\)
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