Question

How many liters of ammonium sulfate are created if 17.3 moles of solute are dissolved to make a 4.3 M solution?

Answer 1

Considering the definition of molarity, 4.02 liters of ammonium sulfate are created if 17.3 moles of solute are dissolved to make a 4.3 M solution.

Molarity

Molarity is a measure of concentration that indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

$molarity=\frac{number of moles of the solute}{volume}$

Molarity is expressed in units $\frac{moles}{liter}$.

This case

In this case, you know:

• molarity= 4.3 M= 4.3 $\frac{moles}{liter}$
• number of moles of the solute= 17.3 moles
• volume= ?

Replacing:

$4.3 \frac{moles}{liter} =\frac{17.3 moles}{volume}$

Solving:

4.3 $\frac{moles}{liter}$× volume= 17.3 moles

volume= 17.3 moles÷ 4.3 $\frac{moles}{liter}$

volume= 4.02 liters

4.02 liters of ammonium sulfate are created if 17.3 moles of solute are dissolved to make a 4.3 M solution.

Learn more about molarity with this example:

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