Question

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?

Answer 1

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Explanation:

You started with a `10.0*mL` volume of `0.50*mol*L^-1` `NaCl`. The starting moles of solute is...................

`0.50*mol*L^-1xx10.0xx10^-3*L=5.00xx10^-3*mol`

If this is diluted, then CLEARLY the concentration of the sodium chloride decreases, but the amount of moles of `NaCl`, `5.00*mmol` is constant.

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

`"Molarity"="Moles of solute"/"Litres of solution"`