Answer:
- Part A Option B
- Part B 5.71 l and 4.29 l
Explanation:
Part A
Let x be the volume of 5% solution
Then the volume of 40% solution is
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