Neco Model Questions Vol1 2020 Chemistry Question 37
Practice objective / multiple choice question 37 from the 2020 Neco Model Questions Vol1 Chemistry examination.
A 0.500 g sample of sodium thiosulphate pentahydrate (\( \mathrm{Na_2S_2O_3\cdot5H_2O} \)) is reacted with excess hydrochloric acid according to the equation \( \mathrm{Na_2S_2O_3 + 2 HCl \rightarrow 2 NaCl + SO_2 + S + H_2O} \). The volume of sulphur dioxide gas collected over water at 25 °C and 760 mm Hg is 44.0 mL. Assuming the vapour pressure of water is 23.8 mm Hg, calculate the percent purity of the sample.
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About This Question
This is Neco Model Questions Vol1 2020 Chemistry Question 37. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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