C = common concentration (g / L)
m1 = mass of solute (g)
V = volume of solution (L)
What is the common concentration in g / l of a 3L solution with 60 g of NaCl?
Common concentration is different from density, although the formula is similar. See the difference:
The density is always the solution, so:
At the common concentration, only msolute, ie m1.