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-1 order of reaction? need help!

Hi i need to find out what order of reaction it is when the graph of initial rate against concentration comes out with a negative gradient but where initial rate and concentration are proportional like this:

|
|--\
|---\
|----\
|-----\
|----- \
|-------\
|--------\
|---------\
|----------\
|____________________________

but without the (-)s


i hope my amusing attempt at a diagram will trick you into a pity reply :smile:
(edited 13 years ago)
Reply 1
Avatar for ManPowa
ManPowa
7
From the graph, your line is curved, The rate decreases as the concentration decreases and thus has a constant half life. The order of reaction will therefore be first.
If the half life increases as the reaction goes on then the order is 2nd. But i think you have a first order.
Reply 2
Avatar for Rainbow249
Rainbow249
2
Original post by ManPowa
From the graph, your line is curved, The rate decreases as the concentration decreases and thus has a constant half life. The order of reaction will therefore be first.
If the half life increases as the reaction goes on then the order is 2nd. But i think you have a first order.


Rate decreases as concentration increases I thought..
Reply 3
Avatar for Rainbow249
Rainbow249
2
Original post by feetfailmenot
Hi i need to find out what order of reaction it is when the graph of initial rate against concentration comes out with a negative gradient but where initial rate and concentration are proportional like this:

|
|--\
|---\
|----\
|-----\
|----- \
|-------\
|--------\
|---------\
|----------\
|____________________________

but without the (-)s


i hope my amusing attempt at a diagram will trick you into a pity reply :smile:


What exam board are you?

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