N1CK Posted August 18, 2009 Report Share Posted August 18, 2009 We're doing Acids & Bases in science atm and as I was flicking through the book reading interesting things(for me) I came across this equation Acid + A Carbonate = A salt + Water + Co2 In other words: Vinegar + limestone or marble= Co2 (YAY!!!!!) :bounce: (Acid) (Carbonate) How long do you reckon a limestone/marble chip last for? (e.g 1cm cubed peice would last 24hrs in 250ml of Vinegar) And yes baking soda is a carbonate and I also wish I had thought of this for science fair Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 18, 2009 Report Share Posted August 18, 2009 in theory. but what you have to worry about is not how long limestone will last for, but instead how long the vinegar will last for. at the top of my head... 2CH3COOH +CaCO3 <---> Ca(CH3COO)2 + CO2 + H2O so then you have to deal with the xs. water and by product. better off using yeast, water and sugar. Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted August 18, 2009 Report Share Posted August 18, 2009 I agree, vinegar is only about 4% acetic acid I think. Quote Link to comment Share on other sites More sharing options...
Cricketman Posted August 19, 2009 Report Share Posted August 19, 2009 but if you got hold of something stronger.... it dangerous ground your treading... lol Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 19, 2009 Report Share Posted August 19, 2009 you could use sulphuric acid, but then have to deal with the side effects of fumes, dead fish, and a hard to control reaction. or HCl, but my favourite would be Nitric Acid. Quote Link to comment Share on other sites More sharing options...
Cricketman Posted August 19, 2009 Report Share Posted August 19, 2009 using an all-glass burrette, you could effectively control the drip rate of a acid into a carbonate... and thereby control the output of CO2... Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 19, 2009 Report Share Posted August 19, 2009 yes you could. good thinking. only at $80 - $200 for a burette, $10 for a conical flask, and $20 - $30 for all the other bits and pieces needed i still say its better to use yeast, sugar and water hahahaha :lol: oh and then you need the burette stand which is like another $40 - $50 I think. Quote Link to comment Share on other sites More sharing options...
Cricketman Posted August 19, 2009 Report Share Posted August 19, 2009 phoenix, you almost sound sarcastic.. its still an idea though! :roll: Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 19, 2009 Report Share Posted August 19, 2009 do I? LOL. you should hear me in real life. :lol: I actually quite like the mad scientist bubbly idea thing going on :lol: (not in a sarcastic way - i really do) I think it would look cool too, I would add some dye to the mix to give it another colour. Quote Link to comment Share on other sites More sharing options...
Cricketman Posted August 19, 2009 Report Share Posted August 19, 2009 lol, i bet you sound alot like me in real life! just i find it hard to convey in type... i will relent that yeast sugar mix is probably more viable options to the financially and dimensionally challenged.. but HCL and carbonate would be more fun... Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted August 19, 2009 Report Share Posted August 19, 2009 I suggest you start making home brew beer or wine and pass the CO2 into the tank. Wine yeasts would last longer. That way you can use the "waste". Quote Link to comment Share on other sites More sharing options...
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