Question

Question #46250

Answer 1

Would you recheck your question? Given these conditions, `"concentration"=14.4*meq*L^-1`

Explanation:

First, we calculate `[Mg^(2+)]` in units of `mol*L^-1`.

`[Mg^(2+)]=(0.675*g)/(24.305*g*mol^-1)xx1/(1925xx10^-3*L)`

`=1.442xx10^-2*mol*L^-1`

`1.442xx10^-2*mol*L^-1xx1000*meq*mol^-1`

`=14.42*meq*L^-1`

`(i.e. "1 mole"=1000 xx10^-3)`

I am really not very happy in using this mass to represent a quantity of `Mg^(2+)`. It should have been a mass of a neutral salt, i.e. `MgCl_2` or `Mg(NO_3)_2`, which speciates in solution to `Mg^(2+)` etc. I would check your question.