CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
In a neutralisation experiment, 25 cm3 of dilute sulfuric acid was required to react completely with 40 cm3 of a 0.25 mol dm−3 potassium hydroxide solution.
(a) Write a balanced chemical equation for the reaction between dilute sulfuric acid and potassium hydroxide.
(b) Calculate the number of moles of potassium hydroxide solution used in the reaction.
(c) How many moles of dilute sulfuric acid would this number of moles of potassium hydroxide react with?
(d) Calculate the concentration of the dilute sulfuric acid.
(e) Which indicator could have been used to determine when neutralisation had just occurred?