Practice Calculations (4.2.3) - Unit 8: Acids and Bases

Practise this section

8 questions

Flashcard drill
2 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
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the pH of a solution with [H⁺] = 1.0 x 10⁻⁴ M?
Show hintHide hint
Use the formula pH = -log₁₀[H⁺].
Question 2.
If the Kb of a weak base is 1.0 x 10⁻⁵, find its strength.
Show hintHide hint
Remember, the higher the Kb, the stronger the base.
3Question 3.
What is the definition of pH?
- A measure of acidity
- A measure of basicity
- The concentration of hydroxide ions
Show hintHide hint
Remember that pH indicates hydrogen ion concentration.
4Question 4.
True or False: pOH is the negative logarithm of the hydroxide ion concentration.
- True
- False
Show hintHide hint
Think about how pH relates to hydroxide ions.
Question 5.
A solution has 0.15 M acetic acid (Ka = 1.8 x 10⁻⁵). Calculate the pH.
Show hintHide hint
Use Ka = x² / (C₀ - x), simplify assuming x is small.
Question 6.
In a titration of 0.1 M HCl with 0.1 M NaOH, determine the volume of NaOH needed to reach the equivalence point for 25 mL of HCl.
Show hintHide hint
This is a 1:1 reaction; equal volumes react at equivalence.

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