Assume that the water of problem 6.20 is treated by an ion exchange process (hardness after ion exchange is zero). the desired level of hardness is 80 mg/l as caco3. the community uses 200,000 gallons of water each day. a. calculate the flow through the ion exchange units and the bypass flow required to meet the desired hardness level. b. list all of the ions in the water and indicate if their concentration will increase, decrease, or not change after ion exchange treatment c. how would using the lime-soda precipitation process for softening affect ion concentrations?

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !