Question

If V2=200mL, C1=80%, C2=50%, what is V1?

Answer 1

125 mL

Explanation:

We are given:

V₁ = x mL

C₁ = 80%

V₂ = 200 mL

C₂ = 50%

Solving for x:

We know that:

V₁C₁ = V₂C₂ [Concentration formula]

replacing the values:

x(80) = (200)(50)

x = 125 mL [Dividing both sides by 80]