25 grams of penicillin is dissolved in 150 grams of water. What is the conce

Question Description

I’m working on a Mathematics question and need guidance to help me study.

   25 grams of penicillin is dissolved in 150 grams of water. What is the concentration of penicillin in parts per million?


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Final Answer

Take the mass of penicillin and divide by the mass of H2O. Then multiply the result by 1 million (1 x 10^6)

Next, divide the mass of penicillin by the mass of water...

(25g) / (150 g) x 1 x 10^6= 1.6667 x 10 ^ 5 ppm

1.7 x 10 ^ 5 ppm  or 17,000 ppm (with sigfigs in mind)

Steve_R944 (190)
Boston College

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