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  1. P

    Chemo P5 tips

    I get the high ratio bit, but im sorry could u explain the low ratio bit a bit more? Shouldnt the mass of Zn be higher if the I : Zn ratio is low?
  2. P

    Chemo P5 tips

    First of all, thanks SO much for all the tips you hav mentioned! U hav NO idea how much this has helped me! :) O/N 2009 PAPER 5. Question 2 (e) This isnt related to a graph. Well there are ratios of I : Zn. I just wanted to know whts wrong with the experiment if the ratio is too high or...
  3. P

    Chemo P5 tips

    wen it says construction lines.. its always to find the gradient. d (ii) is not related to the gradient. Its related to the shape of the graph. It asks if the experiment is reliable and we hav to answer based on our findings (i.e. the graph plotted) If the graph was say a scattered graph with...
  4. P

    Chemo P5 tips

    HELP! O/N 2009 PAPER 5. Question 2 (e) can someone pleaseee explain the reasons? :unknown:
  5. P

    Chemo P5 tips

    Construction lines are nothing but 2 perpendicular lines drawn to the graph (they form a triangle) with the hypotenuse being the straight line of the graph. To find the gradient: y2 - y1 / x2 - x1 (where x and y are points on the graph) for part d (ii): It is suitable for the determination of...
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