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Chemistry · Oct / Nov 2022 · Paper 12 · Question 15

5070The mole and the Avogadro constant

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?

  1. A10 cm3
  2. B20 cm3
  3. C40 cm3
  4. D200 cm3

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Correct answer: B. 20 cm3

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