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What is the concentration of a solution with 10 grams of calcium in 1000 m^3 of water?(a) 150 ppm(b) 250 ppm(c) 800 ppm(d) 1000 ppmThe question was posed to me in an online quiz.My query is from Concentration topic in division Moles, Density & Concentration of Basic Chemical Engineering

Answer» CORRECT answer is (b) 250 ppm

The EXPLANATION is: MOLES of calcium = 10/40 =0.25, => concentration in ppm = (0.25/1000)*10^6 = 250 ppm.


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