Practice Weak Bases (2.3.2) - Unit 8: Acids and Bases

Practise this section

10 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define a weak base.
Show hintHide hint
Consider how it behaves in solution.
Question 2.
What does Kb represent?
Show hintHide hint
Think about its role in equilibrium calculations.
3Question 3.
What property defines a weak base?
- It fully dissociates in water
- It partially dissociates in water
- It cannot accept protons
Show hintHide hint
Consider how weak bases behave in terms of proton acceptance.
4Question 4.
True or False: The Kb of a weak base is used to measure its strength.
- True
- False
Show hintHide hint
Think about what Kb tells you regarding the weak base.
Question 5.
In a 0.200 M solution of a weak base B with a Kb of 3.5 × 10⁻⁶, calculate the [OH-] at equilibrium under the assumption that x is negligible.
Show hintHide hint
Use the Kb formula, remember to check if x is negligible.
Question 6.
Given that the percent protonation of a weak base is 15% in a solution of 0.5 M, what is the value of x?
Show hintHide hint
Use the formula for percent protonation to calculate x.

6 more questions in this section. Enroll free to practise them all.