Question

The molarity of a solution obtained by mixing 750 ml of 0.5m hcl with 250 ml of 2m hcl will be:

Answer 1

[750(.5) +250(2)]/1000.
[375 + 500] /1000
=0.875

Answer 2

Hey !!

M₁V₁ + M₂V₂ = M₃ ( V₁ + V₂ )

= 0.5 × 750 + 2 × 250 = M₃ ( 750 + 250 )

= 375 + 500 = 1000 M₃ (OR) M₃ = 875 / 1000

           = 0.875 M

Hope it helps you !!