Doreen Schmidt is a chemist. She needs to prepare 32 ounces of a 13% hydrochloric acid solution. Find the amount of 16% solution and the amount of 8% solution she should mix to get this solution.

She should mix 20 ounces of 16% solution and 12 ounces of 8% solution.

Step-by-step explanation:

Given:

Doreen Schmidt needs to prepare 32 ounces of a 13% hydrochloric acid solution.

Now, to find the amount she should mix of 16% solution and of 8% solution.

Let the 16% solution amount be

And let the 8% solution amount be

So, the total ounces of solution:

.......(1)

Now, to solve the equation to get the solution she should mix:

Substituting the value of from equation (1) we get:

Subtracting both sides by 2.56 we get:

Dividing both sides by 0.08 we get:

The 16% solution amount = 20 ounces.

Now, substituting the value of in equation (1) we get:

The 8% solution amount = 12 ounces.

Therefore, she should mix 20 ounces of 16% solution and 12 ounces of 8% solution.

step-by-step explanation:

at each of the parallel lines adjacent angles are supplementary. the angles have special names identifying their positions with respect to the parallel lines and transversal. they are corresponding angles, alternate interior angles, or alternate exterior angles. an angles is congruent to its matched angle.