universalcj
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hello guys
I've learned that there are 3 the most popular way to quench the reaction.
1. immerse in the ice bath
2. add acidic or alkaline
3. remove catalyst

and here is the question

The rate of decomposition of hydrogen peroxide catalysed by Fe3+ ions was investigated.

and the answer is dilute with water

why?

why cannot the reaction be quenched by the methods that I stated before?
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Claisen
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Adding a large excess of water strongly dilutes the reaction, meaning the concentration of the reactants becomes relatively very small. Following collision theory, this means less likely successful collisions (bla bla), the rate constantly essentially becomes minuscule and so the reaction is quenced.

Peroxide salts can form which are very explosive, a few labs have blown up by mishandling them. The methods you have suggested would work but aren't the safest. Look up about adding sulfuric acid to h2o2, very bad outcomes!

I imagine this isn't in the textbook but now you know!
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universalcj
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(Original post by Claisen)
Adding a large excess of water strongly dilutes the reaction, meaning the concentration of the reactants becomes relatively very small. Following collision theory, this means less likely successful collisions (bla bla), the rate constantly essentially becomes minuscule and so the reaction is quenced.

Peroxide salts can form which are very explosive, a few labs have blown up by mishandling them. The methods you have suggested would work but aren't the safest. Look up about adding sulfuric acid to h2o2, very bad outcomes!

I imagine this isn't in the textbook but now you know!
thank you!!
your answer was super informative to get rid of my curiousity
but why I cannot immerse in the ice bath?
isn't it just simply decreasing temperature?
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Anonymous778
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(Original post by universalcj)
thank you!!
your answer was super informative to get rid of my curiousity
but why I cannot immerse in the ice bath?
isn't it just simply decreasing temperature?
The reaction may still be Feasible even at low temps, so this may not work
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