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2. used as a short form of "oxidation-reduction," a chemical reaction in which one substance loses electrons to another substance.
5. any of a group of chlorine compounds derived from ammonia.
6. of or relating to pharmacists or medicinal drugs.
7. the process of removing dirt, bacteria, or other unwanted elements; make pure
12. a method of filtering pure water molecules out of salt water or polluted water by forcing the water through a semipermeable membrane.

1. The removal of ions from a solution using an ion exchange process.
3. any of various organic compounds that contain only hydrogen and carbon, such as methane or ethylene.
4. clouded or murky because of stirred-up particles or sediment
8. to pile up, collect, or gather.
9. the state or condition of being impure.
10. definition: a tool used to separate solid from liquid or to separate smaller pieces of something from larger pieces
11. to look deeply into.