Homework Help: Chemistry

Posted by Harjit on Tuesday, February 5, 2013 at 10:36am.

a .50 g of NaCl is added to water to create a .50 L solution. what volume of this solution is needed to create a 1.30L solution that is .100M NaCl

Chemistry - Devron, Tuesday, February 5, 2013 at 10:50am
50g of NaCl*(1 mole of NaCl/58.44g of NaCl)=moles of NaCl

Molarity =moles of NaCl/0.50L

Once you calculate the molarity using the setup, use M1V1=M2V2 to calculate the volume needed.

M1=moles of NaCl/0.50L
V1=?
M2=0.100M
V2=1.30L

Plug in and solve
V1=(M2/M1)V2

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