To calculate the concentration in molarity of a salt solution, you need to know
A) the molar mass of the salt and the total volume of the solution.
B) the mass of the salt added, the molar mass of the salt, the volume of water added, and the total volume of the solution.
C) the mass of the salt added to the solution and the volume of water added to the solution.
D) the mass of the salt added, the molar mass of the salt, and the total volume of the solution.
E) the mass of the salt added to the solution and the total volume of the solution.

Question

Quizplus · Accepted Answer

To calculate molarity, you need to know the moles of the solute (salt) and the volume of the solution. The moles of the solute can be calculated by dividing the mass of the solute added by its molar mass. Therefore, you need to know the mass of the salt added and the molar mass of the salt to calculate the moles of the solute. Additionally, you need to know the total volume of the solution to calculate molarity. Therefore, choice D (the mass of the salt added, the molar mass of the salt, and the total volume of the solution) is the best choice.

To Calculate the Concentration in Molarity of a Salt Solution