Chemistry · May / June 2020 · Paper 22 · Question 5
5070
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Sulfuric acid, H2SO4, reacts with sodium hydroxide, NaOH, as shown. H2SO4(aq) + 2NaOH(aq) Na2SO4(aq) + 2H2O(l) A sample of 25.0 cm3 of 0.0500 mol / dm3 H2SO4 is placed in a beaker. NaOH(aq) is added slowly, from a burette, to the H2SO4 in the beaker. A pH probe is used to measure the pH of the solution in the beaker until a total of 40.0 cm3 of NaOH(aq) is added. The graph shows how the pH of the solution in the beaker changes. 0 0 2 4 6 8 10 12 14 5 10 15 20 25 30 35 40 pH volume of NaOH(aq) added / cm3
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5(a)[2]
5(b)[1]
5(c)[3]
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