Neco 2020 Chemistry Question 6
Practice objective / multiple choice question 6 from the 2020 Neco Chemistry examination.
A 0.250 g sample containing a mixture of \(\mathrm{H_2SO_4}\) and \(\mathrm{HCl}\) is dissolved in water and titrated with 0.1000 M \(\mathrm{NaOH}\). Using phenolphthalein as the indicator, the first endpoint is reached after 23.45 mL of \(\mathrm{NaOH}\) has been added. Using methyl orange as the indicator, the second endpoint is reached after a total of 45.80 mL of \(\mathrm{NaOH}\) has been added. Assuming both acids are completely neutralised, calculate the mass percent of \(\mathrm{H_2SO_4}\) in the original sample.
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About This Question
This is Neco 2020 Chemistry Question 6. It is one of the objective questions from the 2020 Neco Chemistry examination.
Difficulty level: Hard .
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