# Concentrations: Dilution and mixture

## Tutorial 4

Progressive exercise
Add $3.0\; L $ of water at $2.0 \; L $ of a $ 0.40 M$ (M = molar) glucose solution. Calculate the molarity of the glucose in the diluted solution!
Calculation:
Initial solution:
First we calculate .......... the total number of glucose moles:

$n_{so}=2\cdot 0,40=0,80\; mol $
Diluted solution:
We now know .......... the number of moles of glucose: $0,80\; mol$ and the volume: $5,0 \;L$
It is therefore possible to calculate ..........the molarity of glucose:

$[so]=\frac{0,80}{5,0}= 0,16\, M$