Question

We mix three solution of same solute of molarity 1M,2M,3N and volume 1L,2L,3L.Find the molarity of the resultant solution?

Answer 1

Explanation:

Mole of 2.5 L of 1 M NaOH =2.5×1=2.5

Mole of 3.0 L of 0.5 M NaOH =3.0×0.5=1.5

Total moles of NaOH in solution =2.5+1.5=4.0

(Total volume of solution =2.5+3.0=5.5L)

Thus, M

1

×V

1

=M

2

×V

2

4.0=M

2

×5.5

Molarity of resultant solution =M

2

=

5.5

4.0

= =0.73M