I wanted to ask, let say:-
Situation A
1M of Acetic Acid + x amount of Sodium Bicarbonate(Baking Soda)

Situation B
3M of Acetic Acid + x amount of Sodium Bicarbonate(Baking Soda)

From the above situations, 2 different concentration of a same acid, one is triple(Yes, to be exact is TRIPLE) the concentration of the other one and mix with a SAME amount of Sodium Bicarbonate, will reaction make a big difference in terms of :-

1. The amount of CO2 gas produced

2. (Important question)The pressure produced if both reactions are being carried out in a bottle stucked with a rubber stopper.

3. The pressure produce to move an object from the nozzle(To be exact, 1st..the bottle is shaken to enable the reaction take place, the nozzle is still CLOSE(to build up the pressure), after around 10-15 seconds, the nozzle is open, will it create a big difference in terms of pressure of CO2 gas pushes out through the nozzle if using 1M and 3M of Acetic Acid and will it a ble to move a model car with load of 100ml of water + the bottle on the car?)

Thanks

This post has been edited by -Max91-: Jul 15 2009, 02:29 PM

1) theoretically, according to stoichiometry shud be the same

2) shud be same pressure

3) the difference is the one using 3M will definitely causes the CO2 to be released at a much faster rate


aiyaaaaa, use Coke + Mentos lar
u use how much baking soda oso ur 100ml water kenot move lar

Looks like something i did before back in Taylors.

Is this the CO2 car competition?

The pressure build up was quite high,from what i remembered.My team's car moved only 1 meter because of a faulty gear system.

Im not really sure that the concentration of the acid will affect the amount of gas produced.Acetic acid is a weak acid.

OMG cheesenium, can you please guide me more on tat CO2 car competition....ahhhhhhhhhh.....juz tat this time the competition for the 1st time cannot have liquid leakage, meaning that when u pop the bottle, the liquid cannot flow out along with the gas, if not disqualified...btw, its Taylor's CO2 Model Car Competition, I'm really lost now @@ and the competition is on this friday T_______T

of cos it does make a difference,in terms of different concentrations of acids..

but why do u use acetic acid??
it is considered a weak acid

Coke has a pH of 4 whereby lemon juice has pH of 2.3.

The acid level for lemon juice is higher. Though I would want to recommend the best solution which is Hydrochloric Acid but it's corrosive. Yu may want to take hazard precaution.

Regards, Joey

i have never tried acidic to do it nor had it done to anything ive ever owned..but i have seen people come into Lowes(where i work) and purchase the materials to do this... if you do it yourself it will run anywhere from 50-100$ ... depending on what type of stuff you use and so forth... they have kits made for staining/painting cement ... from garages to basements.. go to your local home improvement store and go to the paint department and ask them about it ...they will be able to further assist you in this.. but as far as $$$ it shouldnt be to bad and the work should be easy if the cement doesnt have much stuff on it.. like glue from previous carpet.

hope that helps scottsdale flooring

this is great

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Added on July 24, 2009, 3:32 amyooo joey, watched mythbusters lately ?

This post has been edited by CarroTT: Jul 24 2009, 03:32 AM

I've never watch Mythbusters before. Sorry. Anyway, my Science knowledge is getting rusty.

Regards, Joey

This post has been edited by Joey Christensen: Jul 24 2009, 12:24 PM

I am not sure if the reaction is reversible or not because acetic acid is a weak acid and it doesn't ionised completely. But lets assume the reaction is not reversible.

We still need to know what is the limiting factor of this reaction. If acetic acid as abundant and the end product of CO2 is not affected by the concentration of acetic acid. However, if baking soda is abundant, then the more concentrated the acid, the more CO2 is produced.

Pressure produced is directly proportionate to the amount of CO2 produced

Finally someone mentioned the limiting reagent.

You know, you could get sulphuric acid from car batteries, just sayin.

yooo TS, won any water bottle car race yet ?

no le >_<

den when will u win some ?