Question

The amount of water that should be added to 500 ml of 0.5 n solution of naoh to give a concentration of 10 mg per ml is

Answer 1

Answer:

1000 ml

Explanation:

Quantity of solution = 500ml (Given)

Strength of Naoh = 10mg (Given)

Strength = Molarity × Molarmass

Thus, 10/l = Molarity/40mg

Therefore, the molarity = 0.25

Using the equation of molarity = M1V1 = M2V2

where M1 is the Molarity of first solution, V1 is the Volume of first solution, M2 is the Molarity of second solution  and V2 is the Volume of second solution.

Hence,

0.5M × 500ml

=0.25 × V2mlV2

= 1000 ml

Thus, the amount of water that should be added to the Naoh solution is 1000ml.