Twenty five litres of 60% concentration of acid solution is added to 35 litres…
2020
Twenty five litres of 60% concentration of acid solution is added to 35 litres of 80% concentration of acid solution. What is the concentration of acid in the new solution? (correct to one decimal place)
- A.
62.5%
- B.
71.7%
- C.
60.7%
- D.
55.7%
Attempted by 7 students.
Show answer & explanation
Correct answer: B
Acid in 25 litres of 60% solution = 15 litres.
Acid in 35 litres of 80% solution = 28 litres.
Total acid = 43 litres and total solution = 60 litres.
New concentration = 43/60 x 100 = 71.7% approximately.