Question

Part A

Answer 1

Answer:

• Part A  Option B
• Part B   5.71 l and 4.29 l

Step-by-step explanation:

Part A

Let x be the volume of 5% solution

Then the volume of 40% solution is

• 10 - x

Amount of acid is 10*0.20 for resultant solution, x*0.05 for 5% solution and (10- x)*0.40 is for 40% solution:

• 10*0.20 = x*0.05 + (10 - x)*0.40

Correct equation is B.

Part B

Solving

• 2 = 0.05x + 4 - 0.4x
• 0.35x = 2
• x = 2/0.35
• x = 5.71 l of 5% solution

and

• 10 - x = 10 - 5.71 = 4.29 l of 40% solution