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| Rule 1: The oxidation number of an atom in it's elemental form is ____ |
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| Rule 2: The oxidation number of a simple ion is the ____ of the _____. |
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| The oxidation number of a simple ion is the charge of the ion. |
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| Rule 3: The oxidation number of hydrogen is ____, in it's compounds with ___________. |
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| Rule 3: The oxidation number of hydrogen is +1, in it's compounds with non-metals. |
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| Rule 4: The oxidation of oxygen in a ________ is usually ___. |
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Definition
| Rule 4: The oxidation of oxygen in a compound is usually -2. |
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| Rule 5: In a ________ compound, the sum of all the oxidation numbers must equal ______. |
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| Rule 5: In a neutral compound, the sum of all the oxidation numbers must equal zero. |
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| Rule 6: In a polyatomic ion, the _____ of the oxidation numbers must equal the ________ of the _______. |
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Definition
| Rule 6: In a polyatomic ion, the charge of the oxidation numbers must equal the charge of the ion. |
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| Keeps the same charge as a reactant and a product, no evident change in that specific ion. |
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| What needs to be present in a redox reaction. |
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Definition
An oxidant
A reductant
Spectator Ion (optional) |
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| The substance that causes another substance to undergo reduction and will oxidise itself. |
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| The substance that causes another substance to undergo oxidation and will reduce itself. |
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| Are two cells that generally contain a metal and its metal solution(s) |
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| How can we first write all the half equation of chemicals in galvanic cells? |
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Definition
Look at the electrochemical series.
Whichever comes first is written first (ranked). Then Circle what is present as a reactant in on the first line and product on the second line, if a line is drawn it should be negative otherwise no reaction! |
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| Cathode in the galvanic cells |
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Definition
| Is the positive terminal as it receiving electrons, these electrons travel in the solution it's in making the solution negative. |
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Definition
| Is the negative terminal and repels electrons given from the battery. This sends e's away from it. The solution it's in thus oxidises (loses electrons) and the solution becomes positive. |
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| What stops the build up of too much charge in the solution of galvanic cells |
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Definition
| A salt bridge, generally containing K+ and NO3-. They will attract oppositely charge solution to reduce the build up of charge and keep the reaction going. |
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