Question

What volume of 2.5 m NaOH solution is required to make 1 L of a 0.75 m NaOH?

Answer 1

First calculate how much moles of NaOH is there in a 1L of 0.75M:

`1L*0.75M =0.75moles`
Now, find the moles of x liters of 2.5M NaOH:

`x*2.5M = 2.5x\,moles`
Equating the two equations:

`0.75 = 2.5x`

`x=0.3L`

We need 0.3L of 2.5M NaOH to make a 0.75M of NaOH solution.