9. They are more difficult to refine because they can react so easily, like with particles in the air. And with not so reactive metals they can be refine with out easily being contaminated again.
10. Zinc and copper because those metals are not very reactive. Magnesium is hard to process because of its flamability.
11. Because they can react with oxygen due to there high reactivity levels.
12. Calcium with chromium chloride due to the fact that chromium chloride is less reactive than clacium.
13. The second one will most likely happen because zinc is more reactive than silver.
14. The iron spoon is more reactive then lead nitrate, therefore they will react.
(on paper)
15. Oxidation : When an ion gains one or more electrons
Reduction : When an ion loses one or more electrons
16. (on paper)
17.
a. reduction
b. oxidation
c. reduction
18. Zinc was oxidized
Nickel was reduced
Zinc
19. The postassium was oxidized
mercury has been reduced
postassium
20. (on paper)
21. Electrometallurgy is a electrical current supplying electrons to metal ion
Pyrometallurgy uses thermal energy to supply electrons
Hydrometallurgy uses a water solution to dissolve metal materials and get elements like gold
22. Electrometallurgy
Pyrometallurgy
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