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Author Topic: All doubts here!  (Read 56074 times)

Offline NidZ- Hero

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Re: All doubts here!
« Reply #555 on: May 16, 2010, 05:25:02 pm »
hey guys can any1 help me nov 2000 7 a  ???
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Offline SNA

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Re: All doubts here!
« Reply #556 on: May 16, 2010, 06:26:02 pm »
Hello!!!!!! :D

hey, i need some help with chem  :o

i found this question from one of the past papers:

why are we not supposed to add sulphuric acid directly to dry ammonium salts??

thanks!

 ;D
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Offline Vin

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Re: All doubts here!
« Reply #557 on: May 16, 2010, 07:32:26 pm »

sulfuric acid is a strong acid .. adding to 'ammonium salts' would be a vigorous reaction.. diluting the acid might help
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Offline Syed Kazim

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Re: All doubts here!
« Reply #558 on: May 16, 2010, 07:44:51 pm »
Quote from: Nidzzz on May 16, 2010, 05:25:02 pm
hey guys can any1 help me nov 2000 7 a  ???

What subject?
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--Les intellectuels de résoudre les problèmes, les génies les préviennent.

Offline Vin

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Re: All doubts here!
« Reply #559 on: May 16, 2010, 07:53:13 pm »
Quote from: Syed Kazim on May 16, 2010, 07:44:51 pm
What subject?

maths .. solved already ..
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Offline Syed Kazim

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Re: All doubts here!
« Reply #560 on: May 16, 2010, 07:59:30 pm »
Quote from: ~VIN1094~ on May 16, 2010, 07:53:13 pm
maths .. solved already ..

Oh, okay. :)
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--Les intellectuels de résoudre les problèmes, les génies les préviennent.

Offline SNA

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Re: All doubts here!
« Reply #561 on: May 16, 2010, 08:47:26 pm »
Quote
sulfuric acid is a strong acid .. adding to 'ammonium salts' would be a vigorous reaction.. diluting the acid might help

Thank you!

:D
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Offline Fastal

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Re: All doubts here!
« Reply #562 on: May 20, 2010, 09:27:23 am »
guys english paper 3 tomorow
any tips on how to study for it?
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Offline Vin

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Re: All doubts here!
« Reply #563 on: May 20, 2010, 02:53:24 pm »


Kidney



Nephron

what's the book publication on the cover/first page ??

i dont think a lot has changed this year .. in fact my teacher told me there are some (minute) stuff eliminated ..
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Offline red_911

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Re: All doubts here!
« Reply #564 on: May 24, 2010, 10:57:24 am »
hey plzz anyone explain me question 13 ppr1 O/N 2009  chemistry    ???
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Offline Vin

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Re: All doubts here!
« Reply #565 on: May 24, 2010, 11:14:12 am »
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Offline Allyza1n

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Re: All doubts here!
« Reply #566 on: June 05, 2010, 09:21:30 pm »
hey...
 Question 5 b from chemistry may june 2009 variant 1
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Offline Vin

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Re: All doubts here!
« Reply #567 on: June 05, 2010, 09:25:13 pm »
Quote from: Allyza1n on June 05, 2010, 09:21:30 pm
hey...
 Question 5 b from chemistry may june 2009 variant 1

https://studentforums.biz/index.php/topic,1411.msg249826.html#msg249826

^^I also posted this on the other thread you asked..
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