J.R. S. answered • 02/27/21
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Co + F2 ==> CoF2
This would be an oxidation reduction reaction. F2 is very easily reduced to 2F- while Co is not so easily reduced, but can be oxidized. Looking up the reduction potentials, I find the following:
Co2+ + 2e- ==> Co(s) Eº = - 0.28 V
F2 + 2e- ==> 2F- E– = +2.87 V
Overall redox reaction would be:
F2 + Co ==> Co2+ + 2F-
So, you can write:
Co(s) + F2(g) ==> CoF2(s)
J.R. S.
tutor
You either look them up, or you know them from experience. So Co (cobalt) is a solid under standard conditions, and fluorine is a gas under standard conditions. CoF2 is a salt, so it would be a solid just like NaCl, or KCl, etc. You probably know that O2, H2 N2, etc are all gases, so there are some compounds or molecules you JUST KNOW, and others you have to look up.
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03/03/21
Jenn G.
Please could you explain to me how you determined the phases for the different elements?03/03/21