HELP!!! Rates of Reaction Graphs!!

Help! I'm doing my Chemistry coursework on rates of reactions between sodium thiosulphate and hydrochloric acid. I have drawn my graphs but I can't explain them because I don't know what a curve in the graph means. Can any one explain?? :frown:

Reply 1

The Referee

It depends on the shape of your graph (and what you've plotted), but start by considering whether your reactions are first order/second order and the order of reaction wrt both sodium thiosulphate and the hydrochloric acid.

Reply 2

XxXV1kk1XxX

I have plotted the concentration of the Sodium Thiosulphate and the time. The Hydrochloric Acid in kept the same throughout the experiment. I have plotted my graph with crosses. it goes in a curve top to bottom.

Reply 3

yosrush

So you've plotted concentration of sodium thiosulphate against time taken for reaction to complete? You've then got to make another graph with the rate (1/time). Depending on the shape of the graph, you can work out the order of reaction.

Reply 4

XxXV1kk1XxX

Yes I done three lots of experiments I've made a graph for each and one for the averages. I can't do that because we haven't been taught how to do that in school and my teacher will not accept it. I need to explain the curve. The lower the concentration the longer the experiment took.