Question a chemist mixes 35 milliliters of a solution that is 18% acid with 90 milliliters of a solution that is 68% acid. answer the questions below. do not do any rounding.

Missing questions:

a) How many milliliters of acid are in the resulting mixture?

b) What percentage of the resulting mixture is acid?

a) V ₁ = 35 ml.

ω₁ = 18% = 0,18.

V₂ = 90 ml.

ω₂ = 68% = 0,68.

V (acid) = V₁ · ω₁ + V₂ · ω₂.

V (acid) = 35 ml · 0,18 + 90 ml · 0,68 = 67,5ml.

b) ω (acid) = 67,5 ml : (35 ml + 90 ml).

ω (acid) = 54%.