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Copy of Science Carbonation Experiment By Joseph Elhindi

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Joseph Elhindi

on 18 October 2010

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Transcript of Copy of Science Carbonation Experiment By Joseph Elhindi

Science
Carbonation
Experiment
By Joseph Elhindi
9Sci7
JWO To determine and discover
which soft drink
contains the largest amount
of dissolved gas or bubbles Aim Hypothesis I believe the cola soft drink will
cause the balloon to expand the most, as I
think it has the largest amount of dissolved
gas than the other soft drinks. Also the cola
soft drink will have the largest difference between the mass before and after the experiment. Variables
soft drinks Independent Dependent Size of the balloon and
weight of the softdrink after the experiment Controlled Same balloons, same time the soft drinks are shook, amount sticky tape, amount of shakes
the weight and size
of each bottle. Also the packaging of each bottle.
Materials 1. 1.25L Cola softdrink
bottle 2. 1.25L Sunkist softdrink
bottle 3. 1.25L Lemonade
softdrink bottle 4. 1.25L Pepsi
softdrink
bottle
5. 1.25L Solo softdrink bottle 6. 25 pack of balloons 7. Food Scale 8. Sticky Tape 9. Camera 10. Pencil and Paper to record your answer 11. Measuring Tape 12. Scissors Method 1. Collect all the equipment 2. Weigh all of the soft drink bottles, with an accurate food scale.
3. Carefully unscrew and take off the lid of the bottle trying not to let any dissolved gas out to improve accuracy and fairness. 4. Quickly put the opening of the balloon over the rim and opening of the bottle. 5. Put sticky tape around the rim of the bottle over the balloon for about 5 revolutions to make it secure. 6. Shake the bottle 10 times (5 times up and 5 down) making sure your fingers are tightly griped around the rim. 7. Once you have shook the bottle the balloon should expand, make sure not to let any liquid spill into the balloon. 8. Once the balloon has fully expanded then measure it using a measuring tape and record your answer. 9. Do this for all soft drink bottles try to do them in the same hour or two as you want it to be as accurate as possible. 10.Try to do a repeat test to make your experiment more accurate and reliable. Risk 1 The intensity the soft drink bottle is shaken at may cause the liquid to erupt and go everywhere and ruin your experiment. Do the experiment outdoors so you don't make a mess and also be cautious at the rate and amount you are shaking the bottle and have a tight grip around the rim. Record that your first attempt failed and use your repeat bottle if something wrong happens. Also if this incident does occur step back and leave the bottle to fizz as you don’t want to soak yourself. How to minimise the risk How to deal with the risk Be careful when using certain equipment as they can cause harm to you and your experiment for e.g. the scissors may pop your balloon or you may cut yourself. Don't have the equipment facing yourself and have someone there with you just in case an incident may occur. Risk 2 How to minimise the risk If you do cause any harm to yourself treat it straight away. Also have spare balloons or soft drink bottles. How to deal with the risk Balloon size carbonation
Softdrinks Size of Balloons (cm) Size of 2nd Baloons (cm)
Cola 50 46
Solo 29 27
Sunkist 28 29
Pepsi 38 35
Lemonade 36 39
Mass Differentiation
Softdrinks Mass of softdrinks Mass of Softdrinks
Before the Experiment (kg) After the Experiment (kg)
Cola 1.37 0.65
Solo 1.37 0.72
Sunkist 1.37 0.74
Pepsi 1.37 0.94
Lemonade 1.37 0.99
Results Discussion What significant trends or patterns were observed in your data? The weight of all 1.25L bottles were the same before the experiment The repeat set for the balloon size experiment were similar to the first attempts Solo and Sunkist were similar throughout bout experiments. Cola was proved in both experiments to have the most amount of dissolved gas The Balloons for Pepsi and Lemonade were similar in size for both the repeat and the first attempts What possible
scientific explanation
can you offer for the
findings/results? The cola consists of the most dissolved gas or bubbles as it expanded the balloon the most and had the largest amount of difference when weighed before and after the experiment. In the balloon experiment the solo soft drink had the least dissolved gas causing the balloon to be the smallest. In the weight differentation practical the Lemonade conatined the least dissolved gas, but had the 2nd most amount of dissolved gas in the balloon experiment. The reason why cola had the most dissolved gas was because it was the softdrink that had more pressure within the bottle than outside of the bottle, causing a vast pressure differential. Once the softdrink bottle is opened the pressure inside and outside the bottle equal, causing dissolved gas on the top of the liquid to make a hissing sound. The gas in the softdrink bottle is actually CO2, which is mixed in within the soft drink when it is being made. Were there any factors that may have affected the results? The time as I had to rush the experiment, however i still got a pretty well thought out result. The scale was confusing to use and may have affected my results. The balloons may have affected the result as they kept ripping and it took time to have to replace them. Two changes that I would make to my experiment 1. I would buy better material to get a more accurate answer. 2. Write a time table to plan my time properly to give each step more thought, which would outcome on a more reliable result. Conclusion I believe my experiment was successful
and my results clearly showed that Cola
has the most dissolved gas (carbon dioxide).
My results support my hypthesis as I
predicted that Cola would have the
most dissolved gas and also supports my aim as I have figured
out that cola is the softdrink with
the most dissolved gas, which was the main purpose of this experiment
Bibliography Core Science stage 5 textbook-helped me with organising my report.
Google images- where i got my images from
http://www.cool-science-projects.com/independent-and-dependent-variables.html- this website helped me understand the concept of the variables.
http://www.physlink.com/education/askexperts/ae653.cfm-this website helped me by giving me information about this experiment and carbonation





Links between dependent and independent variable
The more dissolved gas in the different soft drinks (independent variable) will determine the size of the balloon and the weight of the soft drink after the practical experiment (dependent variables). Importance of this trend to the aim of the experiment
This trend is important as it explains why the sizes of balloon and weight of the soft drinks change and differentiate. It also explains how to identify, which softdrink has the most disolved gas, which is by observing the dependent variables. Rank of which softdrinks contain the most dissolved gas. 1. Cola
2. Solo
3. Sunkist
4. Pepsi
5. Lemonade Control of
the Experiment Research I did a repetition of the experiment to acquire
a more accurate and reliable result.
The control and management of the
experiment was pretty well thoguth out. Discussion (Sources)
accoridng to the results achieved cola was the most carbonated softdrink. This result was conveyed in majority of the sources avaliable such as expert opinions and other individuals results of the experiment. Be cautious and safe with the equpiment and have another
person by to help you just incase an incident may occur. According to the results found
cola has the most disolved gas.
While researching I found
that this result is consistent
throughout every source.

Carbonic acid = carbonation
Full transcript