You have a 40% kool-aid solution. however, you need a 5% solution for lab. how would you make 1 l of 5% solution?

The answer to your question is 125 ml of the 40% solution and 875 ml of water

Explanation:

Data

Solution concentration = 40%

Final concentration = 5%

Final volume = 1 l

Formula

                 V₁C₁ = V₂C₂

Solve for V₁

                  V₁ =

V₁ = ?

C₁ = 40%

V₂ = 1 l

C₂ = 5%

Substitution, simplification and result

                  V₁ =  = 0.125 l = 125 ml

Conclusion

        Take 125 of the 40% solution and add (1000 - 125) 875 ml of water