O-LevelChemistryStoichiometry5070/11 · May/June 2024 · Q111 Mark

Four solutions of NaOH are made by dissolving solid NaOH in distilled water. Which method makes a solution with a concentration of 0.10 mol/dm³? [Mr: NaOH, 40]

A1.6 g of NaOH(s) to make 400 cm³ of solution

B3.2 g of NaOH(s) to make 250 cm³ of solution

C4.0 g of NaOH(s) to make 100 cm³ of solution

D8.0 g of NaOH(s) to make 500 cm³ of solution

✓ Correct answer

A: 1.6 g of NaOH(s) to make 400 cm³ of solution

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2024 Paper 1 Variant 1, question 11.

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