Signup
LoginRecent Posts by gunner77
-
-
2006 - 5b
both hydrogen and helium have been used to fill balloons. Hydrogn is more reactive and less safe to use.
use the electronic structure of the atoms of these two elements to explain why hydrogen is more reactive than helium. (3marks)
2006 - 5c
Aluminium is an element in group 3 of the periodic table. Use your knowledge of electronic structure to explain why aluminium is a metal. (3marks)
anyone can help me?
-
-
-
Originally posted by UltimaOnline:
I actually didn't read this thread since it says "Maths", but I just popped in randomly, and noticed gunner77 asking tinuviel07 ("tin tin") some Chem questions.
Just to comment that, if you'd like the input of others (eg. myself), it would probably be a better idea to discuss Chem questions in a "Chem" thread, rather than a "Math" thread.
>>> acid and alkali ---> neutralisation takes place so no change. like tat also can? <<<
The statement "neutralisation takes place so no change" is not sufficient (as tinuviel07 has similarly implied), you have to elaborate on what actually happens during neutralization to explain why the oxidation state of the various species do not change during neutralization.
I'll leave this thread now. If anyone on the forum is interested in a Chem discussion, I would suggest he/she start a Chem thread; it would be more organized, rather than discussing Chem qns in a Maths thread, yes?
(And in case gunner77 is interested in discussing only with tinuviel07, that's also perfectly ok, of course.)
ultima i notice u are a good chemistry helperdont worry i will start a thread on chem
definetely need alot of ppl to help me
not only tin tin.
Edited by gunner77 14 Oct `08, 1:05AM
-
-
-
Originally posted by tinuviel07:
H2SO4 + NaOH => Na2SO4 + H2O
If you look in terms of oxidation number, all the oxidation number did not change.
E.g. Na is still +1 in NAOH or Na2SO4,
Sulphur is still +6.
So means neither lor.
ohh!but my friend explain to me this way
acid and alkali ---> neutralisation takes place so no change.
like tat also can?
Edited by gunner77 14 Oct `08, 12:05AM
-
