1) List the known and unknown quantities.
Final conditions
Volume 2: 10.0 L
Concentration 2: 1.2 M
Final conditions
Volume 1: 2.5 L
Concentration 1: unknown
2) Set the equation
[tex]C1*V1=C2*V2[/tex]3) Plug in the known values and solve for C1
[tex]C1*(2.5\text{ }L)=(1.2\text{ }M)*(10.0\text{ }L)[/tex][tex]C1=\frac{(1.2\text{ }M)*(10.0\text{ }L)}{2.5\text{ }L}=4.8\text{ }M[/tex]The molarity would be 4.8 M.
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