2. a chemist wants to make 4 liters of a 7% acid solution by mixing a 10% acid solution and a 4% acid solution. how many liters of each solution should the chemist use? write your answer as a complete sentence be sure to: (a) define your variable and expressions for the quantities. (b) write an equation that models the problem. (c) solve the equation. (d) state the answer in a complete sentence.

Let be the number of liters of the 10% solution to be used, and the number of liters of the 4% solution. The chemist wants to end up with a 4 liter solution, so

For each liter used in the mixture, a concentration of either 10% or 4% acid will be contributed, and the goal is to make a 4L solution whose concentration is 7%, which means

Solving for gives , so 2L of both solutions is needed.

30

step-by-step explanation:

times by times

a

step-by-step explanation: