Qualification > Sciences
Edexcel CHEMISTRY DOUBTS!!!!
Saladin:
--- Quote from: Psyclax on May 12, 2010, 08:55:44 pm ---THANK YOU SO MUCH!!!! <333 rep for u :D
--- End quote ---
Just doin my job. Pray for me please.
Summer :]:
--- Quote from: The Dude 321 on May 12, 2010, 07:07:41 pm ---I will answer.
Please state the paper number.
--- End quote ---
January 2009 paper the old syllabus
last question
i solved everything...just the last question..oh you might be doing the exam now :( its too late!
wakemeup:
I still don't understand properly as to why the stability of carbonates and nitrates of group 2 increases down the group. Could someone explain it to me clearly? I've read 2 books and both just really confuse me.
Kim:
--- Quote from: wakemeup on May 14, 2010, 04:37:08 pm ---I still don't understand properly as to why the stability of carbonates and nitrates of group 2 increases down the group. Could someone explain it to me clearly? I've read 2 books and both just really confuse me.
--- End quote ---
well as u go down the group the cationic size increases
so there is less polarisation (as the cation is big whereas for polarisation the cation should be small and the anion big)
less weakening of the CO or NO bond
thus the thernal stability increases
wakemeup:
Ah, that makes sense. Thanks.
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