O Level Chemistry (5070)

Stoichiometry Banker

95 questions · about 11% of the marks we indexed · examined in 9 of 9 sessions.

Questions by year

Paper

2026

2026 May/June · Paper 11 · Q81 markEmpirical & molecular formulae
2026 May/June · Paper 11 · Q91 markConcentration & titration calculations
2026 May/June · Paper 11 · Q101 markPercentage yield, purity & composition
2026 May/June · Paper 11 · Q111 markEmpirical & molecular formulae
2026 May/June · Paper 21 · Q2 (a)3 marksGas volumes (molar volume)
2026 May/June · Paper 21 · Q5 (c, f)6 marksMoles & reacting masses
2026 May/June · Paper 31 · Q1 (c(i))1 markConcentration & titration calculations

2025

2025 Oct/Nov · Paper 11 · Q81 markFormulae & equations (incl. ionic)
2025 Oct/Nov · Paper 11 · Q91 markConcentration & titration calculations
2025 Oct/Nov · Paper 11 · Q101 markMoles & reacting masses
2025 Oct/Nov · Paper 11 · Q111 markMoles & reacting masses
2025 Oct/Nov · Paper 21 · Q3 (c)3 marksMoles & reacting masses
2025 Oct/Nov · Paper 21 · Q5 (c)3 marksEmpirical & molecular formulae
2025 Oct/Nov · Paper 21 · Q6 (b(i), b(ii))3 marksMoles & reacting masses
2025 Oct/Nov · Paper 31 · Q1 (d, e)2 marksConcentration & titration calculations
2025 Oct/Nov · Paper 41 · Q2 (d, e)2 marksConcentration & titration calculations
2025 May/June · Paper 11 · Q61 markMoles & reacting masses
2025 May/June · Paper 11 · Q91 markFormulae & equations (incl. ionic)
2025 May/June · Paper 11 · Q101 markFormulae & equations (incl. ionic)
2025 May/June · Paper 11 · Q111 markRelative masses (Ar, Mr)
2025 May/June · Paper 11 · Q121 markGas volumes (molar volume)
2025 May/June · Paper 11 · Q131 markConcentration & titration calculations
2025 May/June · Paper 21 · Q4 (c(i))3 marksMoles & reacting masses
2025 May/June · Paper 21 · Q6 (b, e)5 marksEmpirical & molecular formulae · Moles & reacting masses
2025 May/June · Paper 21 · Q7 (c)2 marksFormulae & equations (incl. ionic)
2025 May/June · Paper 31 · Q1 (c, d, e, f)4 marksConcentration & titration calculations · Moles & reacting masses
2025 May/June · Paper 41 · Q2 (c, d, e, f)4 marksConcentration & titration calculations · Moles & reacting masses

2024

2024 Oct/Nov · Paper 11 · Q71 markFormulae & equations (incl. ionic)
2024 Oct/Nov · Paper 11 · Q81 markRelative masses (Ar, Mr)
2024 Oct/Nov · Paper 11 · Q91 markMoles & reacting masses
2024 Oct/Nov · Paper 11 · Q101 markEmpirical & molecular formulae
2024 Oct/Nov · Paper 11 · Q341 markMoles & reacting masses
2024 Oct/Nov · Paper 21 · Q2 (f)2 marksFormulae & equations (incl. ionic)
2024 Oct/Nov · Paper 21 · Q5 (c)3 marksConcentration & titration calculations
2024 Oct/Nov · Paper 21 · Q6 (d)3 marksMoles & reacting masses
2024 Oct/Nov · Paper 31 · Q1 (d, e, f(i), f(ii))7 marksConcentration & titration calculations · Empirical & molecular formulae · Moles & reacting masses
2024 Oct/Nov · Paper 41 · Q2 (d, e, f(i), f(ii))7 marksConcentration & titration calculations · Empirical & molecular formulae · Moles & reacting masses
2024 May/June · Paper 11 · Q61 markEmpirical & molecular formulae
2024 May/June · Paper 11 · Q71 markRelative masses (Ar, Mr)
2024 May/June · Paper 11 · Q81 markMoles & reacting masses
2024 May/June · Paper 11 · Q91 markMoles & reacting masses
2024 May/June · Paper 11 · Q101 markGas volumes (molar volume)
2024 May/June · Paper 11 · Q111 markConcentration & titration calculations
2024 May/June · Paper 21 · Q1 (e)1 markEmpirical & molecular formulae
2024 May/June · Paper 21 · Q2 (a)2 marksFormulae & equations (incl. ionic)
2024 May/June · Paper 21 · Q3 (a)3 marksGas volumes (molar volume)
2024 May/June · Paper 21 · Q5 (c, e)5 marksFormulae & equations (incl. ionic) · Moles & reacting masses
2024 May/June · Paper 21 · Q9 (c)3 marksEmpirical & molecular formulae
2024 May/June · Paper 41 · Q2 (a(iv))1 markFormulae & equations (incl. ionic)

2023

2023 Oct/Nov · Paper 11 · Q71 markFormulae & equations (incl. ionic)
2023 Oct/Nov · Paper 11 · Q81 markGas volumes (molar volume)
2023 Oct/Nov · Paper 11 · Q91 markMoles & reacting masses
2023 Oct/Nov · Paper 11 · Q101 markPercentage yield, purity & composition
2023 Oct/Nov · Paper 11 · Q111 markGas volumes (molar volume)
2023 Oct/Nov · Paper 21 · Q2 (e)2 marksFormulae & equations (incl. ionic)
2023 Oct/Nov · Paper 21 · Q3 (a)2 marksFormulae & equations (incl. ionic)
2023 Oct/Nov · Paper 21 · Q7 (a, d)5 marksConcentration & titration calculations · Gas volumes (molar volume)
2023 Oct/Nov · Paper 21 · Q9 (c)2 marksEmpirical & molecular formulae
2023 Oct/Nov · Paper 31 · Q1 (d)2 marksConcentration & titration calculations
2023 Oct/Nov · Paper 41 · Q2 (e)2 marksConcentration & titration calculations
2023 May/June · Paper 11 · Q61 markFormulae & equations (incl. ionic)
2023 May/June · Paper 11 · Q71 markPercentage yield, purity & composition
2023 May/June · Paper 11 · Q81 markConcentration & titration calculations
2023 May/June · Paper 11 · Q91 markEmpirical & molecular formulae
2023 May/June · Paper 11 · Q101 markMoles & reacting masses
2023 May/June · Paper 21 · Q4 (c, e)3 marksFormulae & equations (incl. ionic) · Percentage yield, purity & composition
2023 May/June · Paper 21 · Q9 (a, b)4 marksFormulae & equations (incl. ionic) · Gas volumes (molar volume)
2023 May/June · Paper 31 · Q1 (f, g, h)5 marksConcentration & titration calculations
2023 May/June · Paper 41 · Q2 (d, e, f)5 marksConcentration & titration calculations

2022

2022 Oct/Nov · Paper 11 · Q121 markFormulae & equations (incl. ionic)
2022 Oct/Nov · Paper 11 · Q131 markMoles & reacting masses
2022 Oct/Nov · Paper 11 · Q141 markEmpirical & molecular formulae
2022 Oct/Nov · Paper 11 · Q151 markGas volumes (molar volume)
2022 Oct/Nov · Paper 11 · Q161 markPercentage yield, purity & composition
2022 Oct/Nov · Paper 11 · Q281 markConcentration & titration calculations
2022 Oct/Nov · Paper 21 · Q3 (e(i), e(ii))3 marksEmpirical & molecular formulae
2022 Oct/Nov · Paper 21 · Q4 (b, e)5 marksFormulae & equations (incl. ionic) · Percentage yield, purity & composition
2022 Oct/Nov · Paper 21 · Q6 (b(i))2 marksFormulae & equations (incl. ionic)
2022 Oct/Nov · Paper 21 · Q8 (d)1 markFormulae & equations (incl. ionic)
2022 Oct/Nov · Paper 21 · Q9 (a(i))3 marksConcentration & titration calculations
2022 Oct/Nov · Paper 31 · Q1 (b, c, d, e)5 marksConcentration & titration calculations · Moles & reacting masses
2022 Oct/Nov · Paper 41 · Q3 (a)1 markFormulae & equations (incl. ionic)
2022 Oct/Nov · Paper 41 · Q5 (f, g, h, i, j)5 marksConcentration & titration calculations
2022 May/June · Paper 11 · Q121 markFormulae & equations (incl. ionic)
2022 May/June · Paper 11 · Q131 markFormulae & equations (incl. ionic)
2022 May/June · Paper 11 · Q141 markEmpirical & molecular formulae
2022 May/June · Paper 11 · Q151 markMoles & reacting masses
2022 May/June · Paper 11 · Q351 markMoles & reacting masses
2022 May/June · Paper 21 · Q2 (f)3 marksGas volumes (molar volume)
2022 May/June · Paper 21 · Q5 (b(i), b(iii), b(iv))4 marksFormulae & equations (incl. ionic) · Percentage yield, purity & composition · Relative masses (Ar, Mr)
2022 May/June · Paper 21 · Q7 (e)3 marksMoles & reacting masses
2022 May/June · Paper 21 · Q8 (d(ii))3 marksEmpirical & molecular formulae
2022 May/June · Paper 21 · Q9 (b(ii), d(ii))4 marksFormulae & equations (incl. ionic) · Percentage yield, purity & composition
2022 May/June · Paper 31 · Q1 (b, c, d, e, f)6 marksConcentration & titration calculations · Formulae & equations (incl. ionic)
2022 May/June · Paper 41 · Q4 (e, f, j, k, l, m(i))7 marksConcentration & titration calculations · Moles & reacting masses

Find the full paper on the official Cambridge past-papers page or ask your school. “Paper 42” means Paper 4, variant 2.

Subtopics

Subtopic	Marks indexed	Sessions
Concentration & titration calculations Banker	64	9/9
Moles & reacting masses Banker	50	9/9
Formulae & equations (incl. ionic) Banker	35	8/9
Empirical & molecular formulae Banker	27	9/9
Gas volumes (molar volume)	19	7/9
Percentage yield, purity & composition	12	5/9
Relative masses (Ar, Mr)	4	4/9

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