Question

Make 100ml of 0.25Msolution of NaOHfrom 2Msolution of NaOH

Answer 1

2M NaOH means 2 moles in 1l

To make it 0.25M we must add water to it

No. of final moles of Na is same , so

2 * 1 = 0.25 * V

V = 8l

So by adding 7l more water to 1l of 2M NaOH solution we get 8l of 0.25M NaOH solution.

Take out 100 ml from it.