Okay so the keyword is OIL RIG (Oxidation Is Loss, Reduction Is Gain)
But it's not a reaction, so to find an element's oxidation state, you must know their charges. The compound must be balanced, so the elements in a compound have to balance each other out by their oxidation number. then write out their oxidation states individually.
But it's not a reaction, so to find an element's oxidation state, you must know their charges. The compound must be balanced, so the elements in a compound have to balance each other out by their oxidation number. then write out their oxidation states individually.
There's a list that you should have been given that tells you priority when assigning oxidation numbers. I'll copy it out incase you missed it:
1. Elements in their natural state have an oxidation number of 0
2. The sum of oxidation numbers in a compound is always 0
3. The sum of oxidation numbers in an ion is equal to its charge
4. Group 1 is always +1
5. Group 2 is always +2
6. Goup 3 is always +3
7. Flourine is always -1
8. Hydrogen is always +1 except in metal hydrides (e.g. NaH)
9. Oxygen is always -2 except in peroxides and with flourine
10. Chlorine is always -1 except with flourine and oxygen
So eg for the first
Hydrogen is always +1 and then as the total has to balance to 0, Chlorine must be -1
1. Elements in their natural state have an oxidation number of 0
2. The sum of oxidation numbers in a compound is always 0
3. The sum of oxidation numbers in an ion is equal to its charge
4. Group 1 is always +1
5. Group 2 is always +2
6. Goup 3 is always +3
7. Flourine is always -1
8. Hydrogen is always +1 except in metal hydrides (e.g. NaH)
9. Oxygen is always -2 except in peroxides and with flourine
10. Chlorine is always -1 except with flourine and oxygen
So eg for the first
Hydrogen is always +1 and then as the total has to balance to 0, Chlorine must be -1
Original post by Fibonacci28
There's a list that you should have been given that tells you priority when assigning oxidation numbers. I'll copy it out incase you missed it:
1. Elements in their natural state have an oxidation number of 0
2. The sum of oxidation numbers in a compound is always 0
3. The sum of oxidation numbers in an ion is equal to its charge
4. Group 1 is always +1
5. Group 2 is always +2
6. Goup 3 is always +3
7. Flourine is always -1
8. Hydrogen is always +1 except in metal hydrides (e.g. NaH)
9. Oxygen is always -2 except in peroxides and with flourine
10. Chlorine is always -1 except with flourine and oxygen
So eg for the first
Hydrogen is always +1 and then as the total has to balance to 0, Chlorine must be -1
1. Elements in their natural state have an oxidation number of 0
2. The sum of oxidation numbers in a compound is always 0
3. The sum of oxidation numbers in an ion is equal to its charge
4. Group 1 is always +1
5. Group 2 is always +2
6. Goup 3 is always +3
7. Flourine is always -1
8. Hydrogen is always +1 except in metal hydrides (e.g. NaH)
9. Oxygen is always -2 except in peroxides and with flourine
10. Chlorine is always -1 except with flourine and oxygen
So eg for the first
Hydrogen is always +1 and then as the total has to balance to 0, Chlorine must be -1
Oh no you stole my thunder
I was about to send a list like this
But yes, there are several conditions in oxidation, so be careful
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