Question

maximum permitted level of lead in drinking water is 7.0 ppm. Based on
this information, how much lead can safely be dissolved in 1000 kg of water?

Answer 1

7kg of lead can safely be dissolved in 1000 kg of water.

What is ppm ?

It is a unit of measurement of concentration , also known as parts per million.

Amount of solute in 1 million parts of solution

1ppm = 1mg/kg

The maximum permitted level is 7ppm

This means 7mg /kg

For 1000 kg of water = 7000mg lead = 7kg of lead is permissible.

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