Question

A chemist has 20 ml of a 30% acid solution. Write an equation to determine the amount of pure acid that must be added to the 30% acid solution to obtain a 50% acid solution.

Answer 1

To determine the amount of pure acid that must be added to the 30% acid solution to obtain a 50% acid solution, use the equation (0.3)(20 mL) + (x)(y) = (0.5)(20 mL + y), where x is the concentration of the pure acid and y is the volume of the pure acid added.

Step-by-step explanation:

To determine the amount of pure acid that must be added to the 30% acid solution to obtain a 50% acid solution, we can use the equation:

(0.3)(20 mL) + (x)(y) = (0.5)(20 mL + y)

Where x is the concentration of the pure acid and y is the volume of the pure acid added. This equation represents the conservation of mass and can be solved to find the values of x and y.