1. Calculate the concentration, in moldm3, of the solution formed when 19.6g of hydrogen chloride, HCl, are dissolved in water and the volume made up to 250cm3. 2. Ammonium nitrate can be prepared by the reaction between ammonia and nitric acid: NH3+HNO3NH4NO3 The concentration of a nitric acid solution is 1.50moldm3. Calculate the volume of this solution which would be required to react with exactly 25.0g of ammonia. 3. In a titration, 25.0cm3 of a sodium hydroxide solution is neutralised by 23.4cm3 of a hydrochloric acid solution of concentration 0.109moldm3. Calculate the concentration of NaOH to three significant figures