Question

How much water would I need to add to a 175 mL of a 0.45 M KOH solution to make a 0.2 M solution?

Answer 1

393.75mL

Step-by-step explanation:

We know that

C1V1= C2V2

where C = centration, V= volume

C1= 0.45 M

V1= 175 mL = 0.175 L

C2 = 0.2M

⇒V2= C1V1/C2

⇒V2 = 0.175×0.45/0.2

=0.39375L

Therefore, amount of water needed= 393.75mL