IGCSE Chemistry 0620/42/F/M/21 Q4h

Question

(h) Some salts can be made by titration.
In a titration experiment, 20.0cm3 of aqueous sodium hydroxide reacts exactly with 25.0cm3 of 0.100mol/dm3 dilute sulfuric acid to make sodium sulfate.
2NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2H2O(l)

(i) Circle the name of the type of reaction that takes place.
decomposition   neutralisation   precipitation   reduction
[1]

(ii) Calculate the concentration of the aqueous sodium hydroxide in g/dm3 using the following steps.
● Calculate the number of moles of dilute sulfuric acid used.
………………………… mol
● Determine the number of moles of sodium hydroxide which react with the dilute
sulfuric acid.
………………………… mol
● Calculate the concentration of the aqueous sodium hydroxide in mol/dm3.
………………………… mol/dm3
● Calculate the concentration of the aqueous sodium hydroxide in g/dm3.
………………………… g/dm3

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    2022-07-05T13:57:47+08:00

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