Decomposition reaction (1 Viewer)

jjuunnee

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I know that in the decomposition reaction AB --> A+B but I don't understand the examples listed below

First one:
CaCO3 ---> CaO + CO2
why does it equal to calcium oxide + carbon dioxide and not calcium + carbonate?

Second one:
KClO3 ---> KCl + O2
I just don't understand this one haha
 

leehuan

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I know that in the decomposition reaction AB --> A+B but I don't understand the examples listed below

First one:
CaCO3 ---> CaO + CO2
why does it equal to calcium oxide + carbon dioxide and not calcium + carbonate?

Second one:
KClO3 ---> KCl + O2
I just don't understand this one haha
Assuming you meant calcium ions (and carbonate ions) for the first one.

Some reasons I can get off the top of my head
a) What's the point. Their ionic bond will probably reform in a matter of seconds
b) CaO and CO2 are also stable substances that can occur naturally.
 

dan964

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I know that in the decomposition reaction AB --> A+B but I don't understand the examples listed below

First one:
CaCO3 ---> CaO + CO2
why does it equal to calcium oxide + carbon dioxide and not calcium + carbonate?

Second one:
KClO3 ---> KCl + O2
I just don't understand this one haha
Another example
MgSO4 -> MgO + SO3 or
2MgSO4 -> 2MgO + O2 + 2SO2

Pretty much the decomposition tends to form stable substances.

Your second example is not balanced. but if it was the thing to consider, that elements with valency + 1 are likely to easily bond with elements with valency of -1.
 

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