First calculate how much moles of NaOH is there in a 1L of 0.75M: [tex]1L*0.75M =0.75moles[/tex] Now, find the moles of x liters of 2.5M NaOH: [tex]x*2.5M = 2.5x\,moles[/tex] Equating the two equations: [tex]0.75 = 2.5x[/tex] [tex]x=0.3L[/tex]
We need 0.3L of 2.5M NaOH to make a 0.75M of NaOH solution.
