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Which row of the table describes what happens when a solution of a weak acid is diluted? (Assume constant temperature.) | $K_a$ | Extent of acid ionisation | |----------------|---------------------------| | A - HSC - SSCE Chemistry - Question 6 - 2021 - Paper 1
Question 6
Which row of the table describes what happens when a solution of a weak acid is diluted? (Assume constant temperature.) | $K_a$ | Extent of acid ionisation... show full transcript
Worked Solution & Example Answer:Which row of the table describes what happens when a solution of a weak acid is diluted? (Assume constant temperature.) | $K_a$ | Extent of acid ionisation | |----------------|---------------------------| | A - HSC - SSCE Chemistry - Question 6 - 2021 - Paper 1
Step 1
Which row of the table describes what happens when a solution of a weak acid is diluted?
Answer
When a weak acid is diluted, the concentration of the acid decreases, leading to a shift in equilibrium according to Le Chatelier's principle. In this case, the ionization of the acid will increase as a response to the decrease in concentration, in order to maintain the equilibrium. Therefore, the value of , which is the acid dissociation constant, remains the same. The correct option that reflects this situation is:
C. Remains the same | Increases