More cards in this set

This addition removes both temporary and permanent hardness

Water can run through an............to remove the Ca and Mg ions

This experiment is used to compare hardness of water samples

This is where most of our drinking water comes from

The water first passes through a..........to remove large objects

This chemical is added at the final stage of water purification

This method produces totally pure water with nothing in it

This is sometimes added to water and improves dental conditions