The idea that I am going to investigate is how the increase of temperature will affect the speed of reaction.
Planning
The equipment I will need is:
- Goggles for eye protection
- Beaker to put acid and water in
- Stop clock for measuring the time
- Magnesium strips to put in the solution the magnesium strip will be 3cm
- Acid to mix with the water
- Water to mix with the acid
- Measuring cylinder to make the experiment accurate
VARIABLES
When I do my experiment I will change the concentration of the acid but when the acid and water are mixed together I will always keep the concentration 50ml3
I will keep magnesium strips the same size which is 3cm long. Also I will keep the amount of concentration the same. The measuring cylinder will only hold 10ml of liquid therefore I will have to measure 5 lots of liquid each time.
The equipment that I will use to keep my experiment accurate is a cylinder to measure the water in, and the same for acid. I will also use a stop watch to keep the time accurate. Also to make sure that the experiment is a fair test and to make it more accurate I will do the experiment three times.
I will keep these things the same because I want the experiment to be a fait test. (Keeping the amount of concentration the same, the length of the magnesium strips the same)
I will have change the amount of acid and the amount of water in each experiment. I am going to keep the magnesium strip the same for each experiment. I am going to use measuring equipment such as a cylinder so that I keep the experiment accurate and fair. I will use a stop each which will also keep the experiment accurate. I’m going to do the experiment three times so that the experiment can show an average which will give a better and fairer result.
Method
- First I will get my equipment set up ready to start the experiment.
-
Then I will measure out the acid and water and place them in a beaker. I will keep the solution of acid and water 50ml3
- Next I will put the magnesium in the beaker of acid and start the stop watch
- Then I will time how long it takes for the magnesium strip to dissolve
- I will then record my results and do the experiment 3 times.
- Then I will find the average for each of my results and then record then write it down in a graph.
I will have to keep this experiment safe. To do this I will tie my hair back, wear goggles keep every thing away from the experiment and be aware of hot equipment.
Results
X we have waited for 20 minuets for something to happen. I think this result will take a long time for something to happen so I dint wait any more.
Evaluation
I feel that experiment was very successful. I think this because we all worked well as a team. However my experiment could have been improved by being more accurate with the timing. Instead of timing it to 2 decimal places I could have timed it to 3 decimal places and then it would have been more accurate. If I was to do my experiments again change the amount of experiments going on at the same time because the experiment would have gone a lot quicker. There was a slight anomalous result on my graph. There are two results that don’t fit the line of best fit. This happened because we weren’t very accurate at these points on stopping the stop clock at exactly when the magnesium dissolved. If I did this experiment again I would have to be more accurate at stopping the stop watch at the right time.
My results, on conclusion were generally good. They concluded what I predicted. The equation for this experiment and the results is metal + acid → salt + Hydrogen → gas
