Sulphur
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Fair Test · Repeat one experiment 3 times (2 times is enough) which gives a reliable result. · Not working with a catalyst which means there is no speeding up so it is fair. · Only altering 1 variable-temperature. All the others are constant. · Surface area is liquid meaning it will stay the same.
This shows that every 10ºC, the time (mins) decreases by a half. From the graph I can predict that for every 10ºC rise in temperature it will take the cross to be obscured twice as fast. The graph shows that for example if my solution was at 40ºC and the cross obscured in 2 minutes then if I heated the solution so that if it was a ...
