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Old 09-17-2007, 03:42 PM   #1
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Default making CO2

well for my AP Bio class my first lab is for us to make CO2, no matter what it takes. He said he wants it to be creative so here is my idea. take a bottle/cup of water drop a shitload (yes that is a scientific term of quanity) of antiacid tablets (alka seltzer) in the cup. now in theory CO2 will be emitted as a gas due to the chemical reactions taken place between the water and a tablet.

so now i have to capture this gas so i am going to use a balloon but for it to be creative i am going to make a balloon animal out of the gas.

well now for reality, i just tried the experiment and my balloon wouldn't inflate but i think that is caused by the funnel not having a perfect seal around the bottle.

so i'm asking if you guys think this is a good idea and what other ways you know of how to make CO2.
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Old 09-17-2007, 03:48 PM   #2
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Default Re: making CO2

HCL and marble chips , makes shitloads of it if you use powdered marble chips and high molar acid ,
And loving the whole shitload as a scientific measure sure my chemistry teacher would love me writing that in my exam
as for collecting it we used this but with a upturned large measuring cylinder over the water
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Old 09-17-2007, 04:07 PM   #3
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Default Re: making CO2

yeast, sugar, and warm water also works, and is easy. But if you named off a list of chemicals, I could find what would make CO2.
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Old 09-17-2007, 04:07 PM   #4
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Default Re: making CO2

Hold your breath and blow into a balloon.
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Old 09-17-2007, 04:24 PM   #5
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Default Re: making CO2

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Hold your breath and blow into a balloon.
exactly...pretty simple really.
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Old 09-17-2007, 04:27 PM   #6
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Default Re: making CO2

but of what you inhale, 20% is oxygen, and the body only uses about 25% of that.
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Old 09-17-2007, 04:53 PM   #7
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Default Re: making CO2

diet coke and mentos!!!!!
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Old 09-17-2007, 05:01 PM   #8
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Default Re: making CO2

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but of what you inhale, 20% is oxygen, and the body only uses about 25% of that.
Ya just gotta hold your breath till no more oxygen
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Old 09-17-2007, 06:12 PM   #9
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Default Re: making CO2

muz i'm liking the idea you gave me. hmmm, all need to do is prove that the gas being pumped into the inverted test tube is CO2 but i an always prove that through a written chemical reaction.
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Old 09-17-2007, 06:50 PM   #10
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but of what you inhale, 20% is oxygen, and the body only uses about 25% of that.
so ronco is asking for CO2. im sure u could isolate co2 rom the rest.
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Old 09-17-2007, 06:53 PM   #11
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Default Re: making CO2

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diet coke and mentos!!!!!
Thats the best one so far, LOL!
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Old 09-18-2007, 04:19 AM   #12
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Default Re: making CO2

Shitload is a scientific term??, you are joking I take it, ha ha ha!, OK, here's the scene; Senior Lecture speaking to a class of students, "well you take a shitload of......"
Thanks for the laugh anyway, [wipes eyes]
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Old 09-18-2007, 12:38 PM   #13
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Default Re: making CO2

lol, and your first theory would have worked... you just needed lots of pressure.. which would have taken, LOL, shitloads hahahaha
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Old 09-18-2007, 01:06 PM   #14
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Default Re: making CO2

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muz i'm liking the idea you gave me. hmmm, all need to do is prove that the gas being pumped into the inverted test tube is CO2 but i an always prove that through a written chemical reaction.
ANother way to proove its co2 is to put a lighted splint in there and it should go out instantly as there is no oxygen
Or pump it through some limewater and the limewater goes cloudy at the presence of co2
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Old 09-18-2007, 01:08 PM   #15
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Default Re: making CO2

GCSE Science FTW.

My cousin grew up in Scotland and did the Scottish Standard Grades the year they started (it must have been 1986), it seems that the whole CO2 thing is standard everywhere.
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Old 09-18-2007, 01:09 PM   #16
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GCSE Science FTW.

My cousin grew up in Scotland and did the Scottish Standard Grades the year they started (it must have been 1986), it seems that the whole CO2 thing is standard everywhere.
yeah lol
we actually did the hcl marble chip one for coursework
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Old 09-18-2007, 02:19 PM   #17
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Default Re: making CO2

alright well i made a seal around my cup and i got it to work but the balloon didn't fill up all the way because its one of those long balloons where its hard for human lungs to even inflate, and the seal kept breaking so that tells me that the balloon is harder to inflate then it is to break a play dough seal lol.

so i'm gonna try getting a bigger round balloon and see if that helps. also i am going to use your idea muz with the lime water i just have to tell my teacher to get me some calcium hydroxide. thanks guys
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Old 09-18-2007, 05:06 PM   #18
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Default Re: making CO2

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Originally Posted by Ronco Rox View Post
alright well i made a seal around my cup and i got it to work but the balloon didn't fill up all the way because its one of those long balloons where its hard for human lungs to even inflate, and the seal kept breaking so that tells me that the balloon is harder to inflate then it is to break a play dough seal lol.

so i'm gonna try getting a bigger round balloon and see if that helps. also i am going to use your idea muz with the lime water i just have to tell my teacher to get me some calcium hydroxide. thanks guys
awww i though the diet coke and mentos was going to be done, dunno if it would make enough CO2 though
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Old 09-18-2007, 09:49 PM   #19
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awww i though the diet coke and mentos was going to be done, dunno if it would make enough CO2 though
well how would i go about capturing the co2? the mentos creates a reaction with the soda and begins to foam by the time i get the balloon over the mouth of the bottle i'd have soda in it lol.
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Old 09-18-2007, 10:29 PM   #20
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Default Re: making CO2

Just blow up the ballon a couple of times.. stretch it :d I like the limestone Idea though too, I must say..
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