Questiоns 41 – 43 relаte tо the fоllowing problem: A solution of sodium hydroxide contаined 0.95 mol dm-3. Using phenolphthаlein indicator, titration of 50.0 cm3 of this solution required 27.0 cm3 of a hydrochloric acid solution for complete neutralisation. Question 42: How many moles of hydrochloric acid were neutralised? Give your answer to 4 d.p.