My chest is mixing a solution that is 2% acid and another solution that is 8% acid she needs to make 75 mL of a solution that is 5% acid how much of each solution does she use.

The answer to your question is

Volume of solution 2% = 37.5ml

Volume of solution 8% = 37.5ml

Step-by-step explanation:

Data

Solution A = 2% Volume A = ?

Solution B = 8% Volume B = ?

Final solution = 5% Final volume = 75 ml

Process

Write an equation of this experiment

2% (Volume A) + 8% (Volume B) = 5% (75)

Volume A = x

Volume B = 75 - x

Substitution

2% (x) + 8% (75 - x) = 375

Simplification

2x + 600 - 8x = 375

2x - 8x = 375 - 600

-6x = - 225

x = - 225/-6

x = 37.5

Result

Volume A = 37.5 ml

Volume B = 75 - 37.5 = 37.5 ml