I need to build a model volcano?

[Eric Lewis]

What are some good chemicals?

BTW: i cannot use baking soda and vinegar

thanks

[EricNau]

15-30% Hydrogen peroxide and Manganese dioxide. Granted, obtaining that strength H2O2 may prove difficult.

[iJohnHenry]

Yellow phosphorous and air.

Then stand back. http://i55.photobucket.com/albums/g158/MouseMeat/Smilies/terical.gif

Oh, and it's packed in oil for a reason.

[Leareth]

regular peroxide and iron shavings does the trick too

or if you want to be really morbid; peroxide and dried blood (fishing bait)

[MM07]

Mentos and diet Coke? :p

[dvince2]

Do you need it to "erupt"? or just sit there and simmer?

[CorvusCamenarum]

Brake fluid and chlorine (the kind you get for swimming pools). Best to maintain a distance after you mix it and not do it anywhere near anything you mind having razed.

[OnlyMarcusCannn]

I've heard of people using orange food-colored club soda and a block of dry ice to make it erupt. I'm not sure if it works, but it seems possible.

[MacHipster]

Just shrink a volcano. That's what I did.

[119576]

use real magma.

I remember making a 'Mt. Etna' easter bonnet in primary school. I spent a long time in the burns ward.

(mentos and diet coke is a "good" idea)

[Prof.]

Mentos and diet Coke? :p
Actually, that will work. As long as it's not against the rules, I'd say go for it.

[macEfan]

Actually, that will work. As long as it's not against the rules, I'd say go for it.

Yeah, that method seems to be the easiest too :D

[Santa Rosa]

Dynamite

Should give the required effect :)

[gonyr]

If safety isn't a concern (meaning you have a method to ignite it, and can watch from a proper distance), I'd mix up a batch of thermite. Easy to make, and quite spectacular.

[hmmfe]

You can use potassium permanganate and glycerin.

But, I think one of the better chemical reactions is to use ammonium dichromate (add in some magnesium shavings) - then light using a match. It is not really dangerous but you want to be in a ventilated area because the fumes are not the most healthy for you. It does not do the flowing lava thing but instead does a slow burn with flame and ash. That is what I used years ago for my model volcano.