Practice Weak Acids (2.3.1) - Unit 8: Acids and Bases

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6 sample questions

Question 1.
Define a weak acid.
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Think about how weak acids behave compared to strong acids.
Question 2.
What is Ka?
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Remember, larger Ka means a stronger acid.
3Question 3.
What is true about weak acids?
- A. They completely ionize in solution.
- B. They establish an equilibrium in solution.
- C. They are always stronger than strong acids.
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Recall the definition of weak acids.
4Question 4.
Ka represents what in relation to weak acids?
- True
- False
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Remember the relationship between Ka and acid strength.
Question 5.
A weak acid (HA) is 0.2 M with a Ka of 3.6 × 10⁻⁵. What is the pH of this solution?
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Solve for x using the quadratic approximation and then calculate pH.
Question 6.
If a weak acid’s percent ionization is 4% at a concentration of 0.1 M, what is the Ka?
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Remember the equation for percent ionization.

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