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Oxidation?

Posted: Sun Feb 23, 2020 9:42 pm
by Drew Myers 4G
How do you know which part of a redox reaction is the oxidation?

Re: Oxidation?

Posted: Sun Feb 23, 2020 9:44 pm
by Althea Zhao 1B
Oxidation is loss of electrons, so the atom whose charge increases is the one that is oxidized.

Re: Oxidation?

Posted: Sun Feb 23, 2020 9:44 pm
by Sydney Myers 4I
You'll know based on the oxidation states of a certain element. If the oxidation state goes up from the left side of the equation to the right, then that element has been oxidized.

Re: Oxidation?

Posted: Sun Feb 23, 2020 9:45 pm
by Karina Kong 2H
If the charge on the atom increases it is being oxidized. If the charge on the atom decreases it is being reduced.

Re: Oxidation?

Posted: Sun Feb 23, 2020 9:52 pm
by lilymayek_1E
oxidation is the process in which an atom loses an electron (LEO = Lose Electron Oxidation). an example of a redox reaction is Cu2+ + Zn -> Cu + Zn2+. A plus following an atom indicates that the respective atom has less negative charge (electrons) than it would in its standard form on the periodic table. (Essentially, if an atom goes from having no + to having a +, it can be assumed that an electron(s) have been lost). This process is an oxidation, so Zinc in the previous equation goes from no charge to a 2+ charge - that means two electrons have been lost, which is an oxidative process.

Re: Oxidation?

Posted: Sun Feb 23, 2020 10:08 pm
by 805394719
Oxidation is the loss of electrons. In order to determine which species has lost an electron, you need to know the oxidation states of the elements you are dealing with. For example, oxygen has an oxidation state of -2 in H2O whereas hydrogen has an oxidation state of -1. By looking at the oxidation states of a species, we can determine whether they have gained or lost an electron. The oxidation state of a free atom is zero as well as the oxidation state of a compound. So the elements of a compound must have oxidation states that add up to zero. This also allows us to calculate the oxidation state of an element in a compound by looking at the oxidation states of other elements in the compound. For example, the formation of water is a redox reaction where hydrogen is oxidized and oxygen is reduced. 2H2 + O2 --> 2H2O where the oxidation states of H2 and O2 are zero since they are free elements and the oxidation state of water is also zero, however, the oxygen in water has an oxidation state of -2 and hydrogen has an oxidation state of +1. There are two hydrogens which makes a +2 charge which is neutralized by the -2 charge of the oxygen.

Re: Oxidation?

Posted: Sun Feb 23, 2020 10:20 pm
by AKhanna_3H
Oxidation is the loss of electrons, so the oxidation number increases. Reduction is the gain of electrons, so the oxidation number decreases.

Re: Oxidation?

Posted: Sun Feb 23, 2020 10:54 pm
by 805329408
If you figure out the oxidation numbers of each molecule, the group where the oxidation number increases is the portion of the redox reaction that is oxidized since it is gaining a more positive charge, meaning it is donating its electrons.

Re: Oxidation?

Posted: Sun Feb 23, 2020 10:56 pm
by saigorijavolu2k
Oxidation is the loss of electrons. Think of the element getting more positive.

Re: Oxidation?

Posted: Sun Feb 23, 2020 11:07 pm
by Rhea Shah 2F
The atom that is oxidized has lost electrons, so look for the atom whose charge has increased.

Re: Oxidation?

Posted: Sun Feb 23, 2020 11:10 pm
by zfinn
oxidation is loss of electrons, which means the charge of the oxidized atom will increase - the acronym OIL RIG is helpful for me (Oxidation Is Loss (of e-), Reduction Is Gain (of e-))