1
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
Id l hi i k
AQA GCSE
Chemistry Higher H
Paper 2 (8462/2H)
Time allowed: 1 hour 45
Materials i t
For this paper you must have: For Examiner’s Use
• a ruler
Question Mark
• a scientific calculator
• the periodic table (enclosed). 1
2
Instructions
3
• Use black ink or black ball-point pen. 4
• Pencil should only be used for drawing. 5
• Fill in the boxes at the top of this page.
6
• Answer all questions in the spaces provided. Do not
write outside the box around each page or on blank 7
pages. 8
• If you need extra space for your answer(s), use the lined pages
9
at the end of this book. Write the question number against your
answer(s). TOTAL
• Do all rough work in this book. Cross through any work you do not want
to be marked.
• In all calculations, show clearly how you work out your answer.
Information
• The maximum mark for this paper is 100.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear
presentation in your answers.
SOLE Property of Tyrion's AQA Chemistry 2H 2025 Predicted Question Paper
AQA Chemistry 2H 2025 Predicted Question Paper
, 2
Do not write
Outside the
Box
0 1 A A group of students investigated the effect of temperature on the rate
of reaction between sodium thiosulfate and hydrochloric acid. The
reaction produces a precipitate of sulfur, which makes the solution
cloudy. Explain why the solution becomes cloudy as the reaction
progresses.
(2 mark)
0 1 B The students used the following method:
1. Measure 50 cm³ of sodium thiosulfate solution into a
conical flask.
2. Add 10 cm³ of hydrochloric acid to the flask and start a
timer.
3. Observe the time it takes for a black cross under the flask to
disappear.
o Suggest one improvement to ensure accurate results.
(1 marks)
o What is the dependent variable in this experiment?
(1 marks)
o Tick one box: Which factor could be controlled to ensure a fair test?
o Volume of hydrochloric acid
o Concentration of sodium thiosulfate solution
o Temperature of the reaction mixture
(1 marks)
AQA Chemistry 2H 2025 Predicted Question Paper
, 3
Do not write
Outside the
The students repeated the experiment at different temperatures. Their Box
0 1 C
results are shown below:
Temperature (°C) Time for cross to disappear (s)
20 120
30 80
40 50
50 30
0 1 C 1 Calculate the rate of reaction at 40°C using the formula:
1
𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅 𝑜𝑜𝑜𝑜 𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟 =
𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡 𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡 (𝑠𝑠)
(2 marks)
0 1 C 2 Plot a graph of temperature (x-axis) against rate of reaction (y-
axis). Add a line of best fit.
Time for cross to
disappear (s)
Time for cross to
disappear (s)
(2 marks)
AQA Chemistry 2H 2025 Predicted Question Paper
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
Id l hi i k
AQA GCSE
Chemistry Higher H
Paper 2 (8462/2H)
Time allowed: 1 hour 45
Materials i t
For this paper you must have: For Examiner’s Use
• a ruler
Question Mark
• a scientific calculator
• the periodic table (enclosed). 1
2
Instructions
3
• Use black ink or black ball-point pen. 4
• Pencil should only be used for drawing. 5
• Fill in the boxes at the top of this page.
6
• Answer all questions in the spaces provided. Do not
write outside the box around each page or on blank 7
pages. 8
• If you need extra space for your answer(s), use the lined pages
9
at the end of this book. Write the question number against your
answer(s). TOTAL
• Do all rough work in this book. Cross through any work you do not want
to be marked.
• In all calculations, show clearly how you work out your answer.
Information
• The maximum mark for this paper is 100.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear
presentation in your answers.
SOLE Property of Tyrion's AQA Chemistry 2H 2025 Predicted Question Paper
AQA Chemistry 2H 2025 Predicted Question Paper
, 2
Do not write
Outside the
Box
0 1 A A group of students investigated the effect of temperature on the rate
of reaction between sodium thiosulfate and hydrochloric acid. The
reaction produces a precipitate of sulfur, which makes the solution
cloudy. Explain why the solution becomes cloudy as the reaction
progresses.
(2 mark)
0 1 B The students used the following method:
1. Measure 50 cm³ of sodium thiosulfate solution into a
conical flask.
2. Add 10 cm³ of hydrochloric acid to the flask and start a
timer.
3. Observe the time it takes for a black cross under the flask to
disappear.
o Suggest one improvement to ensure accurate results.
(1 marks)
o What is the dependent variable in this experiment?
(1 marks)
o Tick one box: Which factor could be controlled to ensure a fair test?
o Volume of hydrochloric acid
o Concentration of sodium thiosulfate solution
o Temperature of the reaction mixture
(1 marks)
AQA Chemistry 2H 2025 Predicted Question Paper
, 3
Do not write
Outside the
The students repeated the experiment at different temperatures. Their Box
0 1 C
results are shown below:
Temperature (°C) Time for cross to disappear (s)
20 120
30 80
40 50
50 30
0 1 C 1 Calculate the rate of reaction at 40°C using the formula:
1
𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅 𝑜𝑜𝑜𝑜 𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟 =
𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡 𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡 (𝑠𝑠)
(2 marks)
0 1 C 2 Plot a graph of temperature (x-axis) against rate of reaction (y-
axis). Add a line of best fit.
Time for cross to
disappear (s)
Time for cross to
disappear (s)
(2 marks)
AQA Chemistry 2H 2025 Predicted Question Paper
