1 PPM = 1 part solute/ 1 000 000 part solution. What does this represent?

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Study for the Grade 9 Environmental Chemistry Test. Use a blend of multiple-choice questions and detailed explanations. Master key concepts and prepare effectively!

Multiple Choice

1 PPM = 1 part solute/ 1 000 000 part solution. What does this represent?

Explanation:
Parts per million expresses how many parts solute there are in one million parts of solution. It’s a way to describe very small amounts as a ratio scaled to a million. So 1 ppm means there is one part solute for every one million parts of solution. In dilute aqueous contexts, that’s often thought of as about 1 milligram of solute per liter of water when the density is close to that of water. The other magnitudes would correspond to higher concentrations (for example, one part in ten thousand is much more concentrated than one part in a million).

Parts per million expresses how many parts solute there are in one million parts of solution. It’s a way to describe very small amounts as a ratio scaled to a million. So 1 ppm means there is one part solute for every one million parts of solution. In dilute aqueous contexts, that’s often thought of as about 1 milligram of solute per liter of water when the density is close to that of water. The other magnitudes would correspond to higher concentrations (for example, one part in ten thousand is much more concentrated than one part in a million).

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