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AllHonours Q&A » Leaving Cert Chemistry
Equilibrium - Help!
(6 posts)-
Q7- LC 2008 H2 + I2 ----> 2HI (deltaH=51.8) colourless purple colourless Initially the colour of the mixture is deep purple. The purple colour fades and when equilibrium is established the colour of the mixture is pale pink aith 17m HI present. When the colour of the mixture has become pale pink has the reaction ceased? Explain. this is probably really obvious but im confused!Posted 3 years ago #
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I'm not too sure myself, but is it pale pink because equilibrium has been established?? Rate of forward reaction equals rate of reverse reaction so the colour is a mixture of the too sides because no one side has a greater reaction rate.:)Posted 3 years ago #
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complained about this years paper saying it was the hardest one ever and that next years paper will be easier so hopefully there wont be many q's we wont get and to answer your question reaction shifts backward which is exothermic raising the tempPosted 3 years ago #
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Hey, I know this thread is like ages old but I just wanted to answer it incase anyone wanted the answer ...
No, the reaction has not ceased, the system is at equilibrium, in a dynamic state, neither the forward nor the reverse reaction is being favoured
Posted 2 years ago # -
has the reaction ceased?
No - because the reaction is still occurring in both directions. but It has finished because no more than 17m of HI will be produced.perfect answer
p.s Tara Lyons is my teacher.....
Posted 1 year ago # -
p.s Tara Lyons is my teacher.....
Mine too! Well was .. I'll never forget the day she was asking us all had the reaction "ceased, stopped, finished" and had it gone to completion - and then going mad when we mixed them all up ha
Posted 1 year ago #
