# To 225 mL of a 0.80M solution of #KI#, a student adds enough water to make 1.0 L of a more dilute #KI# solution. What is the molarity of the new solution?

Diluting a solution means, as you already know, that the molarity of the solution decreased when water was added.

The idea behind a dilution is that by increasing a solution's volume while maintaining a constant number of moles of solute, you can lower the solution's concentration.

Keep in mind that molarity works with liters of solution, so don't forget to convert the milliliter volume to liters.

You can say that because this is the precise number of moles of solute that must be present in the diluted solution.

This is precisely what you can accomplish using the dilution calculation formula.

Here

Enter your values to obtain

Two sig figs are used to round the result.

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The molarity of the new solution is 0.18 M.

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