13028 14 Saline solution contains 0.90 g sodium chloride in 100 cm3 of solution. (a) The relative formula mass of sodium chloride is 58.5. (i) State what is meant by relative formula mass. [2] (ii) Calculate the molarity of saline solution. Give your answer to 2 significant figures. [2] (b) Draw a dot and cross diagram, using outer electrons only, to show the formation of sodium chloride from a sodium atom and a chlorine atom. [2] 13028 [Turn over (c) Concentrated sulfuric acid reacts with sodium chloride to form hydrogen chloride. (i) Write the equation for the reaction of concentrated sulfuric acid with sodium chloride. [2] (ii) Describe the chemical test for hydrogen chloride. [2]