The Acid Dissociation Constant Ka (OCR A-Level Chemistry A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which arrow correctly represents weak acid dissociation in water?
Which arrow correctly represents weak acid dissociation in water?
⇌ (equilibrium arrows)
For weak acid HA, where should appear in the expression?
For weak acid HA, where should appear in the expression?
In the numerator
What are the units of for any weak acid?
What are the units of for any weak acid?
mol dm
What does a large value indicate about an acid?
What does a large value indicate about an acid?
Stronger acid with more dissociation
What is the pK of an acid with mol dm?
What is the pK of an acid with mol dm?
3.83
If acid X has smaller pK than acid Y, what can you conclude?
If acid X has smaller pK than acid Y, what can you conclude?
X is stronger with larger
Which acid is strongest: HNO (pK 3.39) or HClO (pK 7.53)?
Which acid is strongest: HNO (pK 3.39) or HClO (pK 7.53)?
HNO (smaller pK)
For dibasic acids, how do successive values compare?
For dibasic acids, how do successive values compare?
Each decreases (gets smaller)
In malic acid, which groups dissociate to release H?
In malic acid, which groups dissociate to release H?
Only COOH groups
Which logarithm should be used: pK = -log ?
Which logarithm should be used: pK = -log ?
Base 10 (log)