Question

The volume of water that must be added to a mix of 250 ml of 0.6 m hcl and 750 ml of 0.2m hcl to obtain 0.25 m solution of hcl is

Answer 1

Answer:

1.2l

Explanation:

Quantity of the solution = 250 and 750 ml (Given)

Hcl = 0.6m and 0.2m (Given)

Number of moles of 0.6M HCl = 0.15

Number of moles of 0.2M HCl = 0.15

Let V be the volume of the specified 0.25M solution.

Thus,

No of moles present = 0.15+0.15 = 0.3

Therefore -

= 0.3 × 1000/v(ml) = 0.25 M

= 1.2

Thus to obtain the hcl solution 1.2l of solution is required.