Calculate the molality of a solution containing 14.3 g of NaCl in 42.2 g of water. A) 2.45 * 10^-4 m B) 5.80 * 10^-4 m C) 2.45* 10^-1 m D) 103 m E) 5.80 m

Question

Quizplus · Accepted Answer

First, we need to convert the mass of NaCl to moles using its molar mass:
14.3 g NaCl / 58.44 g/mol NaCl = 0.2446 mol NaCl

Next, we need to calculate the mass of water in kilograms:
42.2 g water / 1000 = 0.0422 kg water

Finally, we can use the formula for molality:
molality = moles of solute / mass of solvent in kg
molality = 0.2446 mol / 0.0422 kg = 5.80 m

Therefore, the best choice is E, with the correct calculation and units.

Calculate the Molality of a Solution Containing 14