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How to understand chemical reactions as you learn them
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Mvpmb
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#1
I'm so sick of memorising all this ****ing jibberish is there any way I can actually understand it?
For example
Reactions of carbonyls in a2
For example
Reactions of carbonyls in a2
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alow
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Snuffleq
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#3
(Original post by alow)
The OCP Core Carbonyl Chemistry is good.
The OCP Core Carbonyl Chemistry is good.
Does this have to do with the crossover rule?
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TheConfusedMedic
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#4
(Original post by Samistrawberry)
HI, I'm having trouble with constructing equations. Would you be able to explain why the symbol equation for Sodium reacting with Oxygen is = Na+02 -> Na20 ?
Does this have to do with the crossover rule?
HI, I'm having trouble with constructing equations. Would you be able to explain why the symbol equation for Sodium reacting with Oxygen is = Na+02 -> Na20 ?
Does this have to do with the crossover rule?
O forms the ion: O2-
Due to the crossover rule, you need 2 sodium ions to balance out the charges so that the overall charge of the compound is 0.
I believe the equation would be:
4Na + O2 --> 2Na2O ?
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I think 
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Snuffleq
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#5
(Original post by surina16)
Na forms the ion: Na+
O forms the ion: O2-
Due to the crossover rule, you need 2 sodium ions to balance out the charges so that the overall charge of the compound is 0.
I believe the equation would be:
4Na + O2 --> 2Na2O ?
Na forms the ion: Na+
O forms the ion: O2-
Due to the crossover rule, you need 2 sodium ions to balance out the charges so that the overall charge of the compound is 0.
I believe the equation would be:
4Na + O2 --> 2Na2O ?
Spoiler:
Show
I think
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TheConfusedMedic
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#6
(Original post by Samistrawberry)
Ah, so that is why we use the crossover rule. I've forgotten the basics
Ah, so that is why we use the crossover rule. I've forgotten the basics
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Snuffleq
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TheConfusedMedic
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#8
(Original post by Samistrawberry)
I remember being taught the crossover rule but it was never explained. Thank you!
I remember being taught the crossover rule but it was never explained. Thank you!
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I think the reason is so that the ions can have a full outer shell, turning them into atoms, which is why the overall charge is 0 
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Snuffleq
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#9
(Original post by surina16)
No worries!
No worries!
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I think the reason is so that the ions can have a full outer shell, turning them into atoms, which is why the overall charge is 0
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Butternuts96
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#10
(Original post by Mvpmb)
I'm so sick of memorising all this ****ing jibberish is there any way I can actually understand it?
For example
Reactions of carbonyls in a2
I'm so sick of memorising all this ****ing jibberish is there any way I can actually understand it?
For example
Reactions of carbonyls in a2
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KombatWombat
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#11
(Original post by surina16)
No worries!
No worries!
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I think the reason is so that the ions can have a full outer shell, turning them into atoms, which is why the overall charge is 0
You need to make sure the charges cancel out so your overall compound is neutral which is why its Na2O
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Snuffleq
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#12
(Original post by KombatWombat)
You're right to make sure that they has a full outer shell, but they're ions in Na2O! An oxygen atom has 6 electrons in its outer shell, so the anion is O2- and has 8 (i.e. a full shell). A sodium atom has 1 electron in its outer shell, so its ion is Na+
You need to make sure the charges cancel out so your overall compound is neutral which is why its Na2O
You're right to make sure that they has a full outer shell, but they're ions in Na2O! An oxygen atom has 6 electrons in its outer shell, so the anion is O2- and has 8 (i.e. a full shell). A sodium atom has 1 electron in its outer shell, so its ion is Na+
You need to make sure the charges cancel out so your overall compound is neutral which is why its Na2O
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KombatWombat
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#13
(Original post by Samistrawberry)
If I was to write the formulae for lead phosphate how would I know whether it should be Pb2+ or Pb4+?
If I was to write the formulae for lead phosphate how would I know whether it should be Pb2+ or Pb4+?
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Snuffleq
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#14
(Original post by KombatWombat)
It gets complicated that far down the periodic table! The full electron shell rule doesn't work so well. It's Pb2+ but I'd have thought you'd be told that.
It gets complicated that far down the periodic table! The full electron shell rule doesn't work so well. It's Pb2+ but I'd have thought you'd be told that.
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