Answer:
162.5 mL
Explanation:
M1*V1 = M2*V2
M - molarity
V - volume of solution
25*1.5 = 0.20 *V2
V2 = (25*1.5)/0.20= 187.5 mL of solution 2.
We had 25 mL of solution 1, solution 2 should have volume 187.5 mL,
so we have to add V2 - V1 = 187.5 - 25 = 162.5 mL of water, or ≈ 163 mL
