Question

What is the molarity of a NaCl stock used to make 750 ml of a dilute 10 mM solution if 5 ml of the concentrated solution was used?

Answer 1

Step-by-step explanation:

The given data is as follows.

`M_(1)` = 10 mM =
`10 * 10^(-3)` M

`V_(1)` = 750 ml,
`V_(2)` = 5 ml

`M_(2)` = ?

Therefore, calculate the molarity of given NaCl stock as follows.

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

`10 * 10^(-3) * 750 ml = M_(2) * 5 ml`

`M_(2)` = 1.5 M

Thus, we can conclude that molarity of given NaCl stock is 1.5 M.