aommaster

I think it does psychologically. I don't really know how it works, but the brain beleives that one of the cookies tastes better, and therefore, you enjoy the taste more. You will need to ask a professional on this though. I don't know WHY it works!

I too, went for all of the above. If I have want to becoeme a chemical engineer, then, I must have a good knowledge of physics and chemistry. The biology isn't that important for me, but, it can help me if I have a bit of general knowledge.

Oh, ok. Thanks alot Glided for your help!

Hehe, my chemistry teacher showed it to us. It was brilliant. It nearly wnet wrong as well! She placed the magnesium ribbon in, and lighted it. But, by mistake, it fell over and burned the filter paper instead. But, we still got to see the reaction! I wish I could see it again!

Pity. I think canned food also is coated with tin, but, I am not sure. Again, don't take my word for it

And where would we get an aluminium can? I hope not those drinks cans as they are coated with tin!

So, that's the bubbling bit solved. So, what is the reaction when heating? H2SO4 ---> H2O + SO3 ???

Yeah, that would be easier. But, if you want to be able to do it right this moment, foil would be the only way!

Double post!! I replied to your earlier one!

At home, I think there is only one way, and that is to start grating aluminium foil. Maybe the other guys may know of a better way!

Well, beleive it or not, she said that it was strange. I am pretty sure that the stirring rods were clean. Could it have reacted with the dust on them? That, could then be possible!

But, why wouldn't it attack the impurities in the glass rod from the first time I started to stir it? It only started after there was very little liquid left. Could this be a possibility because of the varying concentration?

But it wasn't fizzing, it was acutally bubbling like when you boil water. And it only happened when there was very little h2so4 left. Yeah, and I agree with the fact that it could be SO3. Isn't SO3 a gas?

Hehe, I understand chemistry physics and maths very, very well! You don't have to worry. And besides, they are my favourite subjects!

There were no impurities on the glass. And even if so, why didn't it fizz when I poured it in? Also, this only happens when I touch the surface of the sulphuric acid with a stirring rod.

Ok, so that is what would be left, answer to question 1 and 5. Thanks Boris. But what about these: 2.The bubbles that formed awkwardly during boiling 3.What are the fumes made of? 4.How was it formed?

Those are only my guesses, and I am only at the start of my AS course, so, don't take my word for it. Wolfson, YT2095 and other big posters on SF will know. Not me!

Hehe, so, do you know any answers to my adventure?

Hi guys! Well, I did well in my GCSEs and nowm I have gone to do A level chemistry, physics and maths! Well, I asked my teacher on what would be produced if you boiled off the water in sulphuric acid, since it is AQ. She didn't know and told me to boil it so she could find out. Even after the experiment, she didn't know, so question one is, what WOULD be produced? Now, while I was boiling it, it was boiling like normal water until the end where there were about 10cm3 left. It went stable. So, I took out a stirring rod, and started to stir it. Bubbles suddenly erupted from around the rod. When I removed it out, the bubbles stop, when I put it back in, it bubbles again. I think this is the effect of super-heating, but I am not sure. What was happening? That's the second question! Then, the exiting part (and scary), 5 minutes after more heating, white smoke started to erupt from the beaker. It has a sharp smell to it, like the smell you get from HCl and Chlorine, but, it was worse. We had to take the beaker outside and empty the chemistry lab!!! (Only a friend and I were there, so, not a lot of hassle!). What was that smoke that was produced? And how was it formed? Those are questions 3 and 4! Finally, after the smoke stopped, I examined the beaker and there was a yellowinsh liquid in it. It was transparent, but yellow. What was that liquid? Was it concentrated sulphuric acid? That's the last question! Thanks alot guys! MY first lesson in a chemistry class seems like a fairytale!!!

hehe. Yup!

Hehe. I like to think of it like: You are more likely to choose the wrong door from the start, than after one of the doors have been shown to you. I don't like to go into the maths. Its complicated, even though I understand it!

I would say that it is bad, as I heard that it causes Arthritis.

I am not sure, but, I think caesium and below it (alkali matals) react so badly with air, that they are molten since the time they are exposed to it. Is it true?

Hey Kristi, you're esxactly like me! I really love chemistry!