# What is the percent concentration of a 6m solution of NaCl?

##### 1 Answer

A 6 mol/L solution is 30 % by mass.

Percent by mass =

Let's assume that we have 1 L of the solution.

**Calculate Mass of NaCl**

Mass of NaCl = 1 L soln ×

**Calculate Mass of Solution**

To get the mass of the solution, we must know its density. I will assume that density = 1.2 g/mL.

Mass of solution = 1000 mL ×

**Calculate Percent by Mass**

Percent by mass =

Note: I have calculated the answer to only 1 significant figure, because that is all you gave me for the molarity of the NaCl. If you need more precision, you will have to recalculate.