# Concerning the 10.0 mL of 0.50 M NaCl diluted to 100 mL of solution: when a solution is diluted, does the dilution change the number of grams dissolved?

Aug 4, 2017

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#### Explanation:

You started with a $10.0 \cdot m L$ volume of $0.50 \cdot m o l \cdot {L}^{-} 1$ $N a C l$. The starting moles of solute is...................

$0.50 \cdot m o l \cdot {L}^{-} 1 \times 10.0 \times {10}^{-} 3 \cdot L = 5.00 \times {10}^{-} 3 \cdot m o l$

If this is diluted, then CLEARLY the concentration of the sodium chloride decreases, but the amount of moles of $N a C l$, $5.00 \cdot m m o l$ is constant.

Typically we define concentration as..........

$\text{Molarity"="Moles of solute"/"Litres of solution}$