Question

A hydrologist from a government agency tests several samples of water for safety. As part of his examinations, he determines the concentration of lead that is present in each sample.
Which method of expressing concentration should the hydrologist use to describe the concentration of lead in the water?

A) ppm or ppb

B) volume percent

C) mass-volume percent

D) mass percent

Answer 1

A) ppm or ppb

Explanation:

To express the concentration of the lead sample in the water, the best way is to use ppm or ppb.

                       ppm = parts per million

                       ppb  = parts per billion

• ppm and ppb are used to make sense of small concentration values.
• It is the best way of expressing the small amount of solute that is dissolved in a large amount of solvent.
• Other percentage units will not make sense for this expression as they would be too small to make sense of.

The ppm or ppb helps to simply express dilute concentration.

Learn more:

Parts per million brainly.com/question/2854033

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