Answer to Question #115856 in General Chemistry for Rianna Meddar

Question

In order to calculate the concentration in molarity of a salt solution, you need to know?

Answer 1

Answer:

The concentration in molarity $c$ of a salt solution is defined as:

$c = \frac{n}{V}$ ,

where $n$ is the number of the moles of the solute and $V$ is the volume of the solution.

Therefore, you need to know the number of the moles of the solute and the volume of the solution.

Usually, instead of the number of the moles, the mass of the solute (used for the preparation of the solution ) is given. In order to calculate the number of the moles $n$ from the mass of the solute $m$ , use the following relation:

$n = \frac{m}{M}$ ,

where $M$ is the molar mass of the solute.