2.11 A paper mill produces paper from wood pulp. Pulp production (at the pulp plant) begins with digesting the wood chips in a solution of sodium hydroxide and sodium sulfide. The sodium hydrox- ide is diluted with water (shown in the reaction below) prior to being sent to the digester: NaOH + HO Na+ + OH + HO If 4 kg of sodium hydroxide is added for each 1,000 L of water, determine the following: (a) the molarity of the resulting solution, (b) the normality of the result- ing solution (problem from EPA Air Pollution Train- ing Institute).