00:01
All right, guys.
00:02
There's new problem.
00:03
A .d.
00:03
Chapter 18 in chemistry, central science.
00:06
But water supply for our midwestern city contains the following impurities.
00:13
Excuse me.
00:14
Coarse and, finely divided particulate, nitrate ion, trihalomethanes, dissolved phosphorus in the form of phosphates, potentially harmful bacterial stains, and dissolved organic substances.
00:30
With the following processor agents, if any, is effective in each of these impurities.
00:35
Core sand filtration, activated carbon filtration, aeration, ozone ination, precipitation with aluminum hydroxide.
00:44
So, step by step...