Mg/L is equal to which unit?

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Multiple Choice

Mg/L is equal to which unit?

Explanation:
Concentration expressed as milligrams per liter is directly interchangeable with parts per million in dilute aqueous solutions. The reasoning is that 1 liter of water has a mass of about 1,000,000 milligrams. So a solution with 1 milligram of solute per liter corresponds to 1 mg solute in 1,000,000 mg of solution, which is 1 part in a million, i.e., 1 ppm. Therefore, mg/L and ppm are effectively the same unit for typical water analyses. Grams per liter would be 1000 times larger than mg/L (1 g/L = 1000 mg/L, or 1000 ppm), and parts per thousand would be 1000 ppm, not equal to 1 ppm.

Concentration expressed as milligrams per liter is directly interchangeable with parts per million in dilute aqueous solutions. The reasoning is that 1 liter of water has a mass of about 1,000,000 milligrams. So a solution with 1 milligram of solute per liter corresponds to 1 mg solute in 1,000,000 mg of solution, which is 1 part in a million, i.e., 1 ppm. Therefore, mg/L and ppm are effectively the same unit for typical water analyses.

Grams per liter would be 1000 times larger than mg/L (1 g/L = 1000 mg/L, or 1000 ppm), and parts per thousand would be 1000 ppm, not equal to 1 ppm.

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