Twenty five liters of 60% concentration of acid solution is added to 35 liters of 80% concentration of acid solution. What is the concentration of acid in the new solution? (correct to one decimal places)
Quantity of acid in 25 litres mixture = 25 × 60/100 = 15 Quantity of acid in 35 litres mixture = 35 × (80/100) = 28 Total quanity of acid = 28 + 15 = 43 litres Total quanitiy of mixtre = 35 + 25 = 60 Percentage of acid in 60 litres mixture = 43/60 × 100 = 71.67% ≈ 71.7%
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