50.0 grams of sodium benzoate (mw 144.1053 g·mol^-¹) is diluted into enough water to give a 0.95 molal solution. If the density of the solution is .985 g·cm^-³, what is the mass of water that was added?

Question

Quizplus · Accepted Answer

To find the mass of water, first calculate the moles of sodium benzoate: 50.0 g / 144.1053 g/mol = 0.347 moles. Since the solution is 0.95 molal, 0.347 moles of sodium benzoate are dissolved in 0.347 / 0.95 = 0.365 kg of water, which is 365 grams.

500 Grams of Sodium Benzoate (Mw 144