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    http://www.a-levelchemistry.co.uk/OC...resources.html

    for the how far how fast rate homework question 3 I am getting I2 as first order not zero
    because if you compare experiments 1 and 2 the concentration of I2 is x 2 and inital rate x2 and therefore 2^1=2? so 1 st oder
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    (Original post by otrivine)
    http://www.a-levelchemistry.co.uk/OC...resources.html

    for the how far how fast rate homework question 3 I am getting I2 as first order not zero
    because if you compare experiments 1 and 2 the concentration of I2 is x 2 and inital rate x2 and therefore 2^1=2? so 1 st oder
    You cannot use experiments 1 & 2 as the iodine concentration does not change!

    Compare experiments 2 & 3

    Only [iodine] is doubled and the rate does not change.
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    (Original post by charco)
    You cannot use experiments 1 & 2 as the iodine concentration does not change!

    Compare experiments 2 & 3

    Only [iodine] is doubled and the rate does not change.
    No it does change for experiment 1 and 2 its from 0.0200 to 0.0400
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    (Original post by otrivine)
    No it does change for experiment 1 and 2 its from 0.0200 to 0.0400
    no, you are looking at the wrong column. That's H+
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    (Original post by Plato's Trousers)
    no, you are looking at the wrong column. That's H+
    sorry ok if you compare experiments 2 and 3 for I2 you see that the concentration Of I2 x2 and initial x1 so should give 1st order
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    (Original post by otrivine)
    sorry ok if you compare experiments 2 and 3 for I2 you see that the concentration Of I2 x2 and initial x1 so should give 1st order
    In experiments 2 & 3 the iodine concentration doubles BUT there is NO CHANGE in the rate.

    So iodine does NOT EFFECT the rate.

    Rate = k[I2]0
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    (Original post by charco)
    In experiments 2 & 3 the iodine concentration doubles BUT there is NO CHANGE in the rate.

    So iodine does NOT EFFECT the rate.

    Rate = k[I2]0
    ... or affect it, even...
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    (Original post by Plato's Trousers)
    ... or affect it, even...
    Touché :fight:

    hoist by my own petard ...

    ... and a Happy New Year to you.
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    (Original post by charco)
    Touché :fight:

    hoist by my own petard ...

    ... and a Happy New Year to you.
    :five:

    ...or to quote Harvey Denton in League of Gentlemen, "hoist by my own pet toad..."
 
 
 
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