Question

A chemist has a 30% and a 45% acid solution. What amount of each solution should be used to make 500ml of solution with 35% acidity?

A) 133
1
3
ml of 30% solution and 366
2
3
ml of 45% solution
B) 250 ml of each solution
C) 333
1
3
ml 30% solution and 166
2
3
ml of 45% solution
D) 400 ml of 30% solution and 100 ml of 45% solution

Answer 1

A is your correct answer.

Explanation:

Answer 2

The correct answer is 333 1/ 3 ml 30% solution and 166 2/ 3 ml of 45% solution.

Explanation:

Set up 2 equations. Let x be the 30% solution and y be the 45% solution. Then you have x + y =500 and .3x +.45y = .35*500. Then solve the system.