1.4 (a) Calculate the molarity of pure water at 20C. (b) Calculate the molarity of water...

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1.4 (a) Calculate the molarity of pure water at 20°C. (b) Calculate the molarity of water in a 5.0-g/L NaCl solution at 20°C given that the mass of 1.0 L of this solution is 1000.2 g/L. (c) Determine the percentage by which the molarity of pure water is decreased in the salt solution. Answers: (a) 55.44 mol/L; (b) 55.29 mol/L; (c) 0.3%. 1.4 (a) Calculate the molarity of pure water at 20°C. (b) Calculate the molarity of water in a 5.0-g/L NaCl solution at 20°C given that the mass of 1.0 L of this solution is 1000.2 g/L. (c) Determine the percentage by which the molarity of pure water is decreased in the salt solution. Answers: (a) 55.44 mol/L; (b) 55.29 mol/L; (c) 0.3%.