[Mikez]

I just have a answers that need confirming and a question:

1. by heating copper nitrate, a chemical reaction occures but A NEW SUBSTANCE is not created?

2. what happens when soduim iodide and chlorine water is poured into a test tube....I only found one change which is they change colour but I need to find 3.

3. What is the odour of chlorine water? (since chlorine is poisonous...I can't smell it )

thanks

[Alberto_Kravina]

2. what happens when soduim iodide and chlorine water is poured into a test tube....I only found one change which is they change colour but I need to find 3.

Cl₂ is a strong oxidizing agent-what do you think that could happen with the iodide (I^-) ion?

3. What is the odour of chlorine water? (since chlorine is poisonous...I can't smell it )

Try to smell it CAREFULLY

1. by heating copper nitrate, a chemical reaction occures but A NEW SUBSTANCE is not created?

...maybe it is copper nitrate hydrate ( Cu(NO₃)₂ * x H₂O )...maybe the product is anhydrous copper nitrate.

[Mikez]

I would smell it CAREFULLY, but I don't have any at hand is there any science website that might have information of the odour of it?

[kkrizka]

It smells like a pool since that's what they use to clean the water in it. Can't really think of an adjective to describe it though.

[billnotgatez]

From this forum --
Search MSDS: Cornell University
Using --
chlorine
Got this link --
http://msds.ehs.cornell.edu/msds/msdsdod/a98/m48697.htm
With this information --
Appearance and Odor: GAS: GREENISH YELLOW; LIQUID: AMBER. ODOR: PUNGENT


I do not think I would suggest doing a smell test, but I do not know what they teach now days.

[Mikez]

thanks, just a quick question for the natural ionic charge of Flourine, would it be -7 or is it -1?

[mike]

It smells like a pool since that's what they use to clean the water in it. Can't really think of an adjective to describe it though.

I think what you smell at the swimming pool are chloramines and not free chlorine gas.

[jdurg]

I think what you smell at the swimming pool are chloramines and not free chlorine gas.

There will be some chlorine gas odor present too as the chlorine compounds used in pool "chlorine" is typically sodium or calcium hypochlorite, and the hypochlorite ion generally tends to decompose into free chlorine gas.  You don't need a helluva lot of chlorine gas to be able to smell it.