how to plot a rate of reaction graph?

Question

just wondering if anyone has done rates of reactions i dont know how to put my results for the experiament in to graphs,
im doing one graph which is volme (of gass produced) agaist time

i need to do a graph of rates of reaction, how do u work this out to plott it?
i hve results for 5 sec gaps up to 60sec and for molars 0.5. 0.6 0.7 0.8 0.9 and 1.0.

ive been told the graph of rate of reaction isent a straight line so i should square it to get rate against conc squared, any help on this?
lol just a bonus point first and second order reactions?

if it would help i can give you the results
thank you very much xxx

Answer 1

sorry, i cant quite understand the problem because you haven't given the reaction equation, i can only think of things like this starting with that.
typically you would plot volume of gas produce against time, but think carefully here. you are working with kinetics.
say:
1a + 1b --> 2c +1d
now if "c" is your gas your getting two volumes produced this will alter your graph, so be careful

first and second order reactions, oh how many hours did i sit in a lecture theatre listening to this. OK three simple ones you should know.
zero order kinetics - the rate is independent of concentration
(rate = k)

first order kinetics (sorry, am i boring you?)
rate is proportional to the concentration
(rate = k[reactant])

second order kinetics... stay with me, nearly done now
rate is proportional to the square of the concentration
(rate = k[reactant]squared)

remember that they make a big fuss about this - the order of a reaction can only be determined by experiment (or google but they dont like that) there is no pen and paper way to work out the order of a reaction.

good luck with it, and if i were you I'd do biology, its easier :)

charlie

Answer 2

Vol/time....volume is y axis and time is x axis
time/molarity...time is now y axis and molarity is x axis.
this is because the dependant variable(the results you read) go vertically.
Your scale must depend on the size of your graph paper,make it as simple as possible and fill as much of the page as you can.
Not every graph is a straight line graph,there is no need to square,just draw as good a curve as you can through the points,a pattern should be obvious. good luck..results would help,yes.

Answer 3

you opt for separate graphs for various molarities. You plot fee (conc. and quantity of goods- I.e gas produced) as against time. 2d order reactions have a bounce at a undeniable element I do have faith, while first order ones are greater consistent (i does not be one hundred% on that- yet this suggests that simply by you understanding they gained't be today and linear the reaction would be 2d order).

Answer 4

Put the 'time' on the x-axis, then the other numbers on the y-axis.
Then plot your graph, it might give you a straight line or not, then you can draw a line of best fit, which is a straight line that ges through as many points as possible.

Answer 5

Sorry, I haven't done rates of reactions. Wish I could be of more help, but I can't.