Baking soda and vinegar-like reactions?

[Dabomb18359]

I need some help in chemistry. My partner and I need to do an experiment having to do with stoichiometry or something of the sort.

An example would be baking soda and vinegar, measuring through stoichiometry how much product there would be.

Basically, what are some chemical reactions that are as simple as mixing two products together without having to heat or anything else?

Thanks!!

 

[ainwood]

One of the most common used to demonstrate this would be sodium hydroxide & hydrochloric acid.

NaOH + HCl => NaCl + H2O.

 

[Dabomb18359]

Hey I looked that up here and it says there's no reaction. If that's so, I'd like one with a reaction.

 

[El_Machinae]

There's certainly a reaction! edit: in fact, you have to be very careful because of the heat.

What about precipitating out aqueous silver? We did that quite a bit.

 

[Dabomb18359]

How hot do you have to get it?

 

[ThERat]

baking soda and vinegar will result in carbon dioxide as one of the products. This can be used for a nice experiment. If you use the 2 chemicals and put them into a bottle with a valve, put the bottle onto 4 wheels, you got a nice chemical powered car. make sure you accumulate enough gas and then open the vale and the car will be propelled forward very nicely.

our school has this competition running, so maybe you can learn a thing or 2 from there

http://www.np.edu.sg/lsct/chemecar/index.htm

 

[Xanikk999]

Just wondering ainwood where did you get the idea for your avatar? If its common knowledge forgive me. Just looks something like soviet russia. Can you explain it to me?

 

[Sophie 378]

If you're allowed catalysts, a nice 2:1+1 system is the decomposition of hydrogen peroxide. 2 H2O2 (aq) --> H2O (l) + H2 (g), and you can easily measure the volume of gas given off with an inverted, water-filled burette. Then pV =nRT will tell you how many moles of gas you've got. Or, any metal+acid reaction will give you salt+hydrogen.

Hey I looked that up here and it says there's no reaction. If that's so, I'd like one with a reaction.

No, it says there's no visible reaction. Of course there isn't! Both reactants and the products are clear liquids (when aqueous). If you want to measure a result easily, then you need one where, say, a product is a gas from liquids, or there's a colour change. Gases are much easier to measure; you just set up a closed system to measure the volume produced. Colour changes are annoying; you need colorimeters and so on - too fiddly. pH changes are similar - using universal indicator to find an endpoint.

Gimme a minute to find a diagram of the equipment setup you need for measuring gases - it's very easy.

 

[Perfection]

There's always titrations...

If you're allowed catalysts, a nice 2:1+1 system is the decomposition of hydrogen peroxide. 2 H2O2 (aq) --> H2O (l) + H2 (g), and you can easily measure the volume of gas given off with an inverted, water-filled burette. Then pV =nRT will tell you how many moles of gas you've got.

I was just thinking about that reaction an hour ago while playing cribbage. I can't remeber the catalyst, can you?

 

[Fifty]

mentos mints and cola!

 

[Sophie 378]

Apparatus: the grey is water.

The thingy round the test tube is just to it stand upright. Left to right: clamp stand, burette full of water, beaker mostly full of water, rubber tubing leading into test tube with bung.
@Perfection - platinum should work, or there's always catalase. MnO2 is the one I used for my most recent expt on this.

 

[Alex the Great]

Hey cool, we must be using the same book, as our class just finished stoichiometry! What we did was some sodium bicarbonate or calcium carbonate mixed with hydrochloric acid: NaHCO3 + HCl -> CO2 + H2O + NaCl and CaCO3 + 2HCl -> CO2 + H2O + CaCl2. The reactions are pretty usual, what with some bubbling from the CO2 and you end up with some pretty safe byproducts. Just be careful around the HCl and you'll be fine

 

[Cuivienen]

2Na + 2H2O -> 2NaOH + H2 + Lots of energy

Warning: Explosive. Your teacher also probably won't let you do it. Hmm...

@Perfection: Iodine. Silver also works.

 

[Chieftess]

You should ask Strider. He knows this one very well.

 

[Warman17]

I need some help in chemistry. My partner and I need to do an experiment having to do with stoichiometry or something of the sort.

An example would be baking soda and vinegar, measuring through stoichiometry how much product there would be.

Basically, what are some chemical reactions that are as simple as mixing two products together without having to heat or anything else?

Thanks!!

Try this one

N2 + 3H2 -> 2NH3

>_>

 

[Birdjaguar]

Just wondering ainwood where did you get the idea for your avatar? If its common knowledge forgive me. Just looks something like soviet russia. Can you explain it to me?

Ainwood is a patriotic New Zealander doing his part for queen and country.

 

[ainwood]

If you're allowed catalysts, a nice 2:1+1 system is the decomposition of hydrogen peroxide. 2 H2O2 (aq) --> H2O (l) + H2 (g), and you can easily measure the volume of gas given off with an inverted, water-filled burette. Then pV =nRT will tell you how many moles of gas you've got.

On the assumption that its an ideal gas

 

[Strider]

Something easy and fun... just use altoids and soda. Pop about 7-8 altoids into a newly opened (I mean opened 2 or 3 seconds ago) 2-liter soda... and run.

Makes a wonderful soda fountain.

There is some really colorful reactions (really nice to look at, but not overly dangerous) concering Calcium, Sodium, etc. I forget what the other reactants are though, if anyone happens to remember the full reactant list however... I would recommend trying one of those.

Unluckily, I don't think you'd beable to do alot of the reactions I know of in school.

 

[ainwood]

Sodium + water is not what I'd call 'not overly dangerous'. In fact - its very dangerous.

 

[Urederra]

Sodium + ethanol is less dangerous than sodium + water.

Potassium + ethanol.... now we are talking about danger....

Electrolisis is cool. You can do it with a 4.5 V battery, two copper wires or two carbon rods and a beaker of salty (NaCl) water. If you use carbon rods, you can collect H2 and O2 the way Sophie said and see that the H2 container has double volume of gas compared to the O2 container, There you go, You have the stoichiometry. 2 H2O + e ------> 2 H2 + 1 O2

EDIT: a power supply that can generate a constant current of about 4.5 V also works, but, It must be CC, not AC.