Question

If 2.1 moles of NaCl is dissolved in a solution with a total volume of 7.3 liters, what is the molarity of the solution? Round to two decimals.

Answer 1

M = 0.29 M

Step-by-step explanation:

We are given;

Number of moles of NaCl; n = 2.1 moles

Total volume of solution; V = 7.3 L

Formula for molarity is;

M = n/L

Thus;

M = 2.1/7.3

M = 0.2878 M

Approximating to 2 decimal places gives;

M = 0.29 M

Answer 2

The molarity of the solution is 0.29
`(moles)/(liter)`

Step-by-step explanation:

Molarity, or molar concentration, is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species. It is defined as the number of moles of solute that are dissolved in a given volume.

Molarity is calculated as the quotient between the number of moles of solutes and the volume of the solution:

`Molarity=(number of moles of solute)/(volume)`

Molarity is expressed in units
`(moles)/(liter)`.

In this case:

• number of moles of solute= 2.1 moles
• volume= 7.3 liters

Replacing:

`Molarity=(2.1 moles)/(7.3 liters)`

Molarity= 0.29
`(moles)/(liter)`

The molarity of the solution is 0.29
`(moles)/(liter)`