Question

Daniel needs 40ml of a 55% acid solution for a science experiment. he has available a 40% solution and a 60% solution. how many milliliters of the 40% solution and how many milliliters of the 60% solution should he mix to make the 55% solution?

Answer 1

write the chemical equation for the reaction

Answer 2

To make a 55% acid solution, Daniel needs to mix 20 mL of the 40% solution and 20 mL of the 60% solution.

Step-by-step explanation:

To make a 55% acid solution, Daniel needs to mix the 40% solution and the 60% solution. Let's assume he mixes x mL of the 40% solution and (40 - x) mL of the 60% solution. The equation for the resulting concentration is: 0.40x + 0.60(40 - x) = 0.55(40).

Solving this equation, we find that x = 20, which means he should mix 20 mL of the 40% solution and 20 mL of the 60% solution to make the 55% solution.