OCR GCSE CHEMISTRY B J258/02 DEPTH IN
CHEMISTRY FOUNDATION TIER 2025 ACTUAL PAPER
MERGED WITH MARK SCHEME
OCR GCSE CHEMISTRY B J258/02 DEPTH IN CHEMISTRY FOUNDATION TIER
, 1
Oxford Cambridge and RSA
Friday 13 June 2025 – Morning
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
*1893341345*
INFORMATION
• The total mark for this paper is 90.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 28 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8605/7] DC (SL/FC) 354029/4
OCR is an exempt Charity
Turn over
1 Fig. 1.1 shows the names and formulae of some acids and alkalis.
Fig. 1.1
Name of compound Formula
Hydrochloric acid HCl
Acids
Sulfuric acid H2SO4
Lithium hydroxide LiOH
Alkalis Sodium hydroxide NaOH
Potassium hydroxide KOH
(a) Write down the name of a compound from Fig. 1.1 to answer the following questions.
(i) Which compound has a formula with 2 atoms?
........................................................................................................................................
............. [1]
(ii) Which alkali reacts with hydrochloric acid to make sodium chloride?
........................................................................................................................................
............. [1]
(iii) Which alkali has the highest relative formula mass?
Use the Periodic Table to help you.
© OCR 2025
, 2
........................................................................................................................................
............. [1]
(iv) Which two compounds can each react with magnesium metal to make hydrogen?
.......................................................................
and ..................................................................... [1]
(v) Which compound gives a white precipitate when a few drops are added to dilute
barium nitrate?
........................................................................................................................................
............. [1]
(b) Which statements are true and which are false?
Tick (✓) one box in each row.
True False
Acids form hydrogen ions when they dissolve in water.
All neutralisation reactions make water.
Copper does not react with dilute acid.
Titrations give qualitative data.
[3] (c) A student does a titration to find out how much acid is needed to neutralise
25.0 cm3 aqueous sodium hydroxide.
They add the aqueous sodium hydroxide to a conical flask.
Aqueous sodium hydroxide
(i) The student adds another substance to the conical flask so that they know when the
aqueous sodium hydroxide is neutralised.
Name this substance.
Describe how the substance shows the student that the aqueous sodium hydroxide
has been neutralised.
Name ..............................................................................................................................
..................
© OCR 2025 Turn over
, 3
Description .....................................................................................................................
..................
........................................................................................................................................
..................
(ii) Which other piece of apparatus does the student need to do the titration?
Tick (✓) one box.
Bunsen burner
Burette
Stop clock
Test-tube
Thermometer
(iii) The student does the titration and then looks at the results of another student.
Explain why the student looks at the results of another student.
........................................................................................................................................
..................
........................................................................................................................................
............. [1]
2 Several processes can be used to produce drinking water.
Each process has a purpose.
(a) Draw lines to connect each water treatment process with its correct purpose.
Water treatment process Purpose
Aeration Separates pure water from salt water.
Uses oxygen to break down harmful
Distillation
waste.
Filtration Removes solid impurities.
(b) Water for drinking is treated with chlorine.
What is the test and expected result for chlorine gas?
Tick (✓) one box in each column.
Test Expected result
Aqueous bromine goes blue
© OCR 2025
CHEMISTRY FOUNDATION TIER 2025 ACTUAL PAPER
MERGED WITH MARK SCHEME
OCR GCSE CHEMISTRY B J258/02 DEPTH IN CHEMISTRY FOUNDATION TIER
, 1
Oxford Cambridge and RSA
Friday 13 June 2025 – Morning
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
*1893341345*
INFORMATION
• The total mark for this paper is 90.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 28 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8605/7] DC (SL/FC) 354029/4
OCR is an exempt Charity
Turn over
1 Fig. 1.1 shows the names and formulae of some acids and alkalis.
Fig. 1.1
Name of compound Formula
Hydrochloric acid HCl
Acids
Sulfuric acid H2SO4
Lithium hydroxide LiOH
Alkalis Sodium hydroxide NaOH
Potassium hydroxide KOH
(a) Write down the name of a compound from Fig. 1.1 to answer the following questions.
(i) Which compound has a formula with 2 atoms?
........................................................................................................................................
............. [1]
(ii) Which alkali reacts with hydrochloric acid to make sodium chloride?
........................................................................................................................................
............. [1]
(iii) Which alkali has the highest relative formula mass?
Use the Periodic Table to help you.
© OCR 2025
, 2
........................................................................................................................................
............. [1]
(iv) Which two compounds can each react with magnesium metal to make hydrogen?
.......................................................................
and ..................................................................... [1]
(v) Which compound gives a white precipitate when a few drops are added to dilute
barium nitrate?
........................................................................................................................................
............. [1]
(b) Which statements are true and which are false?
Tick (✓) one box in each row.
True False
Acids form hydrogen ions when they dissolve in water.
All neutralisation reactions make water.
Copper does not react with dilute acid.
Titrations give qualitative data.
[3] (c) A student does a titration to find out how much acid is needed to neutralise
25.0 cm3 aqueous sodium hydroxide.
They add the aqueous sodium hydroxide to a conical flask.
Aqueous sodium hydroxide
(i) The student adds another substance to the conical flask so that they know when the
aqueous sodium hydroxide is neutralised.
Name this substance.
Describe how the substance shows the student that the aqueous sodium hydroxide
has been neutralised.
Name ..............................................................................................................................
..................
© OCR 2025 Turn over
, 3
Description .....................................................................................................................
..................
........................................................................................................................................
..................
(ii) Which other piece of apparatus does the student need to do the titration?
Tick (✓) one box.
Bunsen burner
Burette
Stop clock
Test-tube
Thermometer
(iii) The student does the titration and then looks at the results of another student.
Explain why the student looks at the results of another student.
........................................................................................................................................
..................
........................................................................................................................................
............. [1]
2 Several processes can be used to produce drinking water.
Each process has a purpose.
(a) Draw lines to connect each water treatment process with its correct purpose.
Water treatment process Purpose
Aeration Separates pure water from salt water.
Uses oxygen to break down harmful
Distillation
waste.
Filtration Removes solid impurities.
(b) Water for drinking is treated with chlorine.
What is the test and expected result for chlorine gas?
Tick (✓) one box in each column.
Test Expected result
Aqueous bromine goes blue
© OCR 2025
