Chemistry Practice Problems Dilution Practice Problems Solution: How is the molarity of a 0.50  M  KBr solution cha...

# Solution: How is the molarity of a 0.50  M  KBr solution changed when water is added to double its volume?

###### Problem

How is the molarity of a 0.50  M  KBr solution changed when water is added to double its volume?

###### Solution

We’re asked to determine how the molarity of a 0.50 M KBr solution changes when water is added to double its volume.

Recall that when we are adding water (or solvent) to a solution, we are diluting the solution.

When dealing with dilution we will use the following equation:

$\overline{){{\mathbf{M}}}_{{\mathbf{1}}}{{\mathbf{V}}}_{{\mathbf{1}}}{\mathbf{=}}{{\mathbf{M}}}_{{\mathbf{2}}}{{\mathbf{V}}}_{{\mathbf{2}}}}$

M1 = initial concentration
V1 = initial volume
M2 = final concentration
V2 = final volume

Calculate the Molarity of KBr when its volume is doubled.

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