Finding Charge

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Victoria Luu - 1C
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Finding Charge

Postby Victoria Luu - 1C » Thu Feb 21, 2019 12:44 pm

How exactly do you find the charge of a reactant if the charge is not given?

Alexa Tabakian 1A
Posts: 38
Joined: Fri Sep 28, 2018 12:20 am

Re: Finding Charge

Postby Alexa Tabakian 1A » Thu Feb 21, 2019 3:10 pm

Use the charges from the periodic table! Hope this helps!

A De Castro 14B 2H
Posts: 75
Joined: Fri Sep 28, 2018 12:29 am

Re: Finding Charge

Postby A De Castro 14B 2H » Thu Feb 21, 2019 3:34 pm

If by "charge is not given," you mean that the molecule has a neutral charge, then the charge would be 0. For example, H2O is a neutral molecule; it has a net charge of 0. Based on the charges from the periodic table, oxygen usually has a 2- charge while hydrogen usually has a + charge.
2H+ + O2- → H2O, so (2 x +1) + -2 = 0.

Albert_Luu3K
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Finding Charge

Postby Albert_Luu3K » Thu Feb 21, 2019 7:23 pm

Usually if the charge is not given, that means the molecule is a neutral charge (0). Using that knowledge, you should be able to use the periodic table to find the oxidation state of one of the elements and deduct the oxidation state of the other.


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