The apparatus used
Test tube
Measuring cylinder (big and small)
Stopwatch clock
Electric scales
Glass beaker
Beehive shelf
Plastic beaker
Water
Acid
Clap stand
Trough
The reaction vessel
Each minute I will time the limestone reacting with the acid and water, with different concentrated acid for 10 minutes. I am going to collect the gas, and record the results each minute. The limestone will be measured so it is 5.09 (units) all time for every experiment. My set up will also stay the same, my equipment is used safely. So my results don’t go wrong.
Obtaining Evidence
I am timing the gas collected each minute, until 10 minutes have gone.
Here are all my results in tables.
My results
100% acid rain
Half strength
13ml acids and 13ml water
¼ strength
65 ml acid 195 ml water
¾ strength
19 ½ acid 6 ½ water
1of 8th of acid and1of 8th of water
All my results are fair and have been done accurately and test has been done fair both tests have been calculated so that I have an average results. The equipment for each experiment has been setup the same and always had been the same so that I get accurate results for my experiment.
Formula to how calculated then pot the graphs
Test 1 + test 2 ÷ 2 = average Then with this average I will plot a graph
Analysing evidence and drawing conclusion
In my evidence collected I have noticed that the 19 ½ acid and 6 ½ water collected more gas than any other strength quicker. I have noticed that acid strength is weaker more diluted the results either slow down, or stay the same. By looking at the results when the acid is at full strength it take’s its time to eventually stop collecting gas. Gas is collected fast when the acid is at full strength you can see that by looking at results. The reason for this is because in the acid are many particles, and there’s less in the limestone. The acid is much stronger than the limestone the gas to collect needs to collide with the limestone in order for both to react with each other. To react strong enough they have to collide hard enough
Scientific Knowledge
Reaction rates are explained perfectly by collision theory. Its really simple it just says that the rate of a simply depends on how often and how hard the reacting particles collide with each other. The basic ideas is that particles have to collide in order to react, and they have to collide hard enough as well.
Evaluating evidence
By looking at my results the more strength acid is acting with limestone gives off more gas to be collected. By looking at my graph I’m noticing that the more strength acid, starts off fast. There reaction is taking places when collision are happening the more collision taking places = the more gas collected.
The reason why full strength acid is the best is because more collision are happening with the limestone so more gas is coming off (being collected).
If I had to improve my results I would recorded the temperatures more accurate than I did for my other experiment. I would also record the room temperatures as it might of effected my results. I would also do all experiment on the same day so that room temperatures is same for each experiment
