🧪 Chemistry · Equilibrium · NEET & JEE

A weak acid is 1% dissociated (alpha = 0.01) in a 0.1 M solution. Its dissociation constant Ka is about:

Answer: 1 x 10 -5.

A 1 x 10-3
B 1 x 10-5
C 1 x 10-7
D 1 x 10-2

Correct answer: B. 1 x 10-5

Explanation: Ka = C x alpha2 = 0.1 x (0.01)2 = 1 x 10-5.

As the reaction proceeds, reactant concentration falls and product concentration rises until both level off at equilibrium.

Concept context

When forward and reverse reaction rates are equal, equilibrium is reached. Learn about Kc, Kp, Le Chatelier's principle, and acid-base equilibria, including pH, buffer solutions, and solubility product.

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A weak acid is 1% dissociated (alpha = 0.01) in a 0.1 M solution. Its dissociation constant K<sub>a</sub> is about:

Concept context

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