What volume of 0.50 M CaCl2 solution is needed to prepare 250 mL of solution that has a chloride concentration of 0.100 M?
The chemical reaction is given as follows
CaCl2⟶Ca2++2Cl−
0.5M0.5M2×0.5M=1M
The solution of 1 M
Cl−
is diluted to 250 ml .
Hence by sing the formula
M1V1=M2V2
V1=M2V2M1=
=0.1×2501
V1=25ml