Question

The volume of water must be added to 100 ml of 0.5 M NaOH solution to get 0.2 M solution is
A. 50 ml
B. 100 ml
C. 150 ml
D. 200 ml

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Answer 1

Answer:

molarity of the solution initially: M1 5 M

volume of the solution initially: V1 100 ml 1 litre

molarity of solution after dilution M2..

2M volume of the solution after dilution V2:

to be determined

Formula used: V1M1 equals to V2M2 then V2 equals to VIMI/M2 equals to 1x. 5/.2 equals to .25 litres equals to 250 ml

volume of solvent to be added to get the dilute solution : 250 ml - 100 ml equals to 150 ml

Ans: 150 ml

I hope it will help you...