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Another Mixture
Dr. Joe has 2 liters of 70% benzene solution and 4 liters of 40% benzene solution. Dr. Joe decides to combine both solutions together, creating a 6-liter solution. What is the new percentage of benzene after everything is combined?
Answer
The new solution will be 50% benzene.First calculate the amount of benzene that you have:
2(.70) = 1.4 liters in the 2-liter solution.
4(.40) = 1.6 liters in the 4-liter solution.
To get the final percentage, add these up and divide by the total amount of solution:
(1.4 + 1.6) / 6.0 = 0.5 = 50% solution.
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