I need help for expriment with carbonation

[ksuppal]

I was told to do an expriment which compares the carbonation levels of different soft drinks. How would I do this expriment. How do I find the carbonation level of a soft drink. Can you plz help me!!!! I need help bad. so can you help me.

[ecoli]

hmm... the best thing to do is to measure the gas by volume.

 

 

Maybe via a balloon over the soda bottle for a certain amount of time, so all the carbon dioxide comes out of solution. You could measure the volume of the gas by water displacement.

[ksuppal]

how do you measure the volume of the gas by water displacement. I'm in grade 9 nine so I don't know much about science so could you explain how to measure the volume of gas by water displacement.:confused:Can some please help me agian.and can this be done at home becaue i don't have any lab or anything like that.

[ecoli]

volume, of course, is simply a measure of 3 dimensional space. One way to measure water by diplacement in your home is by filling up a tub of water to the top (you can use a measuring cup to measure the exact volume that the tub holds.) Simply take your ballon and push into the tub of water. The water the balloon displaces will come out of the tub. Then, use you measuring cup to measure the amount of water that is left in the tub.

 

The original volume of the tub minus the volume that is left is the volume of the balloon, which is filled with the gas trapped from the soda bottle, the volume of the balloon will be approximately be equal to the volume of gas inside of it.

 

Of course, it will won't be a perfectly accurate way of measuring it. There are other factors that affect the volume of gasses such as temperature and air pressure, but these should be fairly constant throughout your experiment, not to mention the volume of the latex of the balloon. Ideally, you'd want to measure moles of gas produced, but I think the calculations & chemistry to that may be a little above you current level. You aren't learning about the gas laws in school are you?

 

 

Also, my idea is only one, and there many other things you could to do measure CO2 levels, with other physical measurements or chemical measurements. you should still try to come up with your own ideas, because thats why these experiments are assigned in school.

[Bluenoise]

This is soo easy. Just take a collection of soft drinks in plastic bottles of the same volume.

One by one shake them like hell, then bunch a very very small hole in the bottom. and collect what sprays out. Once the preasure equilbrates it will stop spraying due to the very small hole in the bottom, and surface tension of the liquid.

Anyways which ever sprays the most liquid has the most carbonation.

[ecoli]

This is soo easy. Just take a collection of soft drinks in plastic bottles of the same volume.

One by one shake them like hell, then bunch a very very small hole in the bottom. and collect what sprays out. Once the preasure equilbrates it will stop spraying due to the very small hole in the bottom, and surface tension of the liquid.

Anyways which ever sprays the most liquid has the most carbonation.

 

that would work if your only need qualitative data.

[Bluenoise]

Well he stated he wanted to compare the levels in different, and my method will work very well for that.

 

If you want quantitative data well you'll have to do more work than that. You could even do it by weight. A can of flat coke should weight less than a fresh can. However you'd be very hard pressed to find a balance sensitive enough which can handle the 350g weight of a can of coke.