O-LevelChemistryAcids, Bases & Salts5070/12 · Oct/Nov 2022 · Q151 Mark

4.0 g of sodium hydroxide, NaOH, is dissolved in 250 cm³ of water in a graduated flask. A 25 cm³ sample of this solution is titrated with 0.50 mol/dm³ hydrochloric acid. Which volume of hydrochloric acid is required to exactly neutralise the alkali?

A10 cm³

B20 cm³

C40 cm³

D200 cm³

✓ Correct answer

B: 20 cm³

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 2, question 15.

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