Question 1a

Marks: 1

a)

Using section 22 of the data booklet, identify an indicator that would show a yellow colour in ammonia solution?

[1]

Key Concepts

Acid-Base Titrations

Question 1b

Marks: 2

b)

Suggest two characteristics that make a good indicator for a titration?

[2]

Key Concepts

Acid-Base Titrations

Question 1c

Marks: 1

c)

A typical set of acid-base titration results in shown in the table.

	Rough	Run 1	Run 2
Initial burette reading /+0.05 mL	0.00	0.30	0.60
Final burette reading/ +0.05 mL	24.15	22.55	22.95

Determine the mean volume from these results.

[1]

Key Concepts

Acid-Base Titrations

Question 1d

Marks: 1

d)

What is the recorded uncertainty on the mean volume calculated in part c)?

[1]

Key Concepts

Acid-Base Titrations

Question 2a

Marks: 1

a)

State the relationship between pH and hydrogen ion concentration.

[1]

Key Concepts

pH & [H⁺]

Question 2b

Marks: 1

b)

Determine the pH of 0.200 mol dm^-3 hydrochloric acid.

[1]

Key Concepts

pH & [H⁺]

Question 2c

Marks: 1

c)

Determine the hydrogen ion concentration in a sample of lake water of pH 5.60.

[1]

Key Concepts

pH & [H⁺]

Question 2d

Marks: 1

d)

The table below shows the hydrogen ion concentration in three solutions:

	P	Q	R
[H⁺]	0.001	1 x 10^-5	1.00

List the three solutions in order from low pH to high pH

[1]

Key Concepts

Interpreting pH

Question 3a

Marks: 1

a)

State what is meant by the ionic product of water.

[1]

Key Concepts

The Ionic Product of Water

Question 3b

Marks: 1

b)

Calculate the concentration of [H⁺] in a solution of sodium hydroxide, NaOH, whose concentration is 0.001 mol dm^-3.

[1]

Key Concepts

The Ionic Product of Water
Acid-Base Calculations

Question 3c

Marks: 1

c)

Calculate the pH of 0.001 mol dm^-3 NaOH solution.

[1]

Key Concepts

Acid-Base Calculations

Question 3d

Marks: 1

d)

The ionic product of water is 2.916 x 10^-14mol² dm^-6 at 313 K. What is the pH of water at this temperature?

[1]

Key Concepts

Acid-Base Calculations
The Ionic Product of Water

Question 4a

Marks: 2

a)

State one advantage and one disadvantage of using a pH meter instead of universal indicator to measure pH.

[2]

Key Concepts

pH Meters & Universal Indicator

Question 4b

Marks: 2

b)

State the name and formula of a strong alkali and a weak alkali.

[2]

Key Concepts

Strong & Weak Acids & Bases
Making Salts

Question 4c

Marks: 1

c)

State the meaning of the term dissociation as applied to acids and bases

Key Concepts

Strong & Weak Acids & Bases

Question 4d

Marks: 2

d)

Write equations for the dissociation of:

Nitric acid, HNO₃: ...................................

Methanoic acid, HCOOH: ............................

[2]

Key Concepts

Strong & Weak Acids & Bases

Question 4e

Marks: 1

e)

Identify the formula of the weakest conjugate base produced in the two acids in part d).

[1]

Key Concepts

Conjugate Pairs & Acid-Base Strength

Question 5a

Marks: 2

a)

Explain the difference between the terms strong acid and weak acid.

[2]

Key Concepts

Comparing Strong & Weak Acids

Question 5b

Marks: 2

b)

Other than measuring the pH, describe how you could distinguish between dilute solutions of the same concentration of hydrochloric acid and ethanoic acid.

[2]

Key Concepts

Comparing Strong & Weak Acids

Question 5c

Marks: 1

c)

A solution of 2.00 mol dm^-3 hydrochloric acid was added to marble chips and the volume of carbon dioxide recorded. A graph of the result is shown below:

On the same graph, sketch the result of repeating the experiment with 2.00 mol dm^-3ethanoic acid.

[1]

Key Concepts

Comparing Strong & Weak Acids
Rate of Reaction

Question 5d

Marks: 1

d)

The same experiment in part c) can be carried out by measuring how the mass of the reaction flask changes with time.

Sketch a graph of the expected result.

[1]

Key Concepts

Rate of Reaction
Comparing Strong & Weak Acids

DP IB Chemistry: HL

Topic Questions

8.2 More About Acids

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Key Concepts

Resources

Members

Company

Quick Links