January 25, 2021, 02:11:28 AM
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Topic: K + O2 --> K2O or KO2  (Read 275 times)

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Offline xshadow

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K + O2 --> K2O or KO2
« on: January 10, 2021, 11:47:02 AM »
I don't understand what is the product I get when I put potassium in contact with air...

I'll get K2O or KO2...some textbooks say the first one other the second
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Offline AWK

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Re: K + O2 --> K2O or KO2
« Reply #1 on: January 10, 2021, 12:28:54 PM »
AWK

Offline xshadow

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Re: K + O2 --> K2O or KO2
« Reply #2 on: January 10, 2021, 06:33:19 PM »
https://www.webelements.com/potassium/chemistry.html

So if I burn (heat?)  K + O2 I'll get KO2

But if potassium reacts with oxygen without "burning" will I get  K2O instead?
Or without burning nothing happens ...?


Thanks!!

Offline AWK

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Re: K + O2 --> K2O or KO2
« Reply #3 on: January 10, 2021, 06:42:46 PM »
During burning - mainly KO2, otherways mixture of K2O2 and K2O, with ozone - KO3
AWK

Offline Borek

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Re: K + O2 --> K2O or KO2
« Reply #4 on: January 11, 2021, 03:53:03 AM »
Broadly speaking there is no simple answer to the question about which oxide is produced. You will almost always get a mixture of oxides. Which one dominates depends on exact reaction conditions and composition of mixture of reagents. Then, the oxides can further quickly decompose, making things even more complicated.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

Offline xshadow

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Re: K + O2 --> K2O or KO2
« Reply #5 on: January 11, 2021, 04:46:08 AM »
understood!!
Thanks guys!! :)

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