BRAINCAKEThe Acid Dissociation Constant Ka
A weak acid only partially dissociates in aqueous solution, setting up an equilibrium:
HA(aq) &rlhar H+(aq) + A-(aq)
The equilibrium constant for this dissociation is called the acid dissociation constant, Ka. Its expression is:
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Key terms in this lesson
- weak acid
- An acid that only partially dissociates into its ions in aqueous solution.
More in Acids, Bases and Buffers
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- Strong and Weak Acids and Bases
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- Calculating the pH of a Weak Acid
- The Ionic Product of Water Kw
- Calculating the pH of a Strong Base
All 15 lessons in Acids, Bases and Buffers · All OCR A-level Chemistry topics