Question

You have 50 milliliters of a 0.45 M MgBr2 solution and dilute it to a total volume of 300 milliliters. What is the molarity of the resulting solution? Describe in

words how you will find the new molarity.

Answer 1

Given :

Initial volume ,
`v_1=50\ ml` .

Final volume ,
`v_2=300 \ ml` .

Initial molarity ,
`M_1=0.45 \ M` .

To Find :

Molarity of 300 ml solution .

Solution :

We know , for constant moles .

`M_1v_1=M_2v_2\\\\M_2=(M_1v_1)/(v_2)\\\\M_2=(50* 0.45)/(300)\ M\\\\M_2=0.075\ M`

Therefore , the molarity of the resulting solution is 0.075 M.

Hence , this is the required solution .