Question

75.0 mL of water was added to 100.0 mL of
0.250 M CaCl, solution. Assume the
volumes are additive. Determine the CaCl2
concentration in the diluted solution.

Answer 1

The concentration of the CaCl2 would be 0.143 M

Dilution Equation

Using the dilution equation:

M1V1 = M2V2

That is, the number of moles of solutes in a solution before dilution must be equal to the number of moles of solutes in the solution after dilution.

In this case,

M1 = 0.250, V1 = 100 mL, M2 = ? V2 = 100 + 75 = 175 mL

M2 = M1V1/V2

             = 0.250 x 100/175

                  = 0.143 M

Thus, the diluted solution must have a molarity of 0.143 M

More on dilution can be found here: https://brainly.com/question/17145416