Question

How many mL of a 2.0 M CuCl2 solution are needed to make 500 mL of a 0.5 M solution?

Answer 1

Answer: There is 125 mL of a 2.0 M CuCl2 solution are needed to make 500 mL of a 0.5 M solution

Step-by-step explanation:

Given:
`M_(1)` = 2.0 M,
`V_(1)` = ?

`M_(2)` = 0.5 M,
`V_(2)` = 500 mL

Formula used to calculate the volume is as follows.

`M_(1)V_(1) = M_(2)V_(2)`

Substitute the values into above formula as follows.

`M_(1)V_(1) = M_(2)V_(2)\\2.0 M * V_(1) = 0.5 M * 500 mL\\V_(1) = 125 mL`

Thus, we can conclude that there is 125 mL of a 2.0 M
`CuCl_(2)` solution are needed to make 500 mL of a 0.5 M solution.