« previous next »
Pages: [1] 2   Go Down

Author Topic: Chem paper 3 help!!  (Read 3449 times)

Offline thukon

  • SF Citizen
  • ***
  • Posts: 250
  • Reputation: 128
  • Gender: Male
  • Blah
Chem paper 3 help!!
« on: May 28, 2009, 04:08:42 am »
Just generally, what tests do we need to learn? Like test for sulphur dioxide other ones?

And does anyone know a chem guide website? I already know chemguide.co.uk, but thats mostly for A levels.
« Last Edit: May 28, 2009, 04:12:14 am by thukon »
Logged

Offline jkiam11

  • Newbie
  • *
  • Posts: 23
  • Reputation: 1
Re: Chem paper 3 help!!
« Reply #1 on: May 28, 2009, 04:15:29 am »
You need to know basic tests such as oxygen and hydrogen tests and also tests for soluble ions such as zinc ion and copper ions.
Logged

Offline thukon

  • SF Citizen
  • ***
  • Posts: 250
  • Reputation: 128
  • Gender: Male
  • Blah
Re: Chem paper 3 help!!
« Reply #2 on: May 28, 2009, 04:17:28 am »
Yes but sometimes they ask tests fro random gases like sulphur dioxide. And what catalysts do we need to know? Like for decomposition of hydrogen peroxide and what else?
Logged

Offline jkiam11

  • Newbie
  • *
  • Posts: 23
  • Reputation: 1
Re: Chem paper 3 help!!
« Reply #3 on: May 28, 2009, 04:25:02 am »
Which paper did they ask you to test a random gas? There is nothing about identifying sulphur dioxide in the syllabus.
Logged

Offline thukon

  • SF Citizen
  • ***
  • Posts: 250
  • Reputation: 128
  • Gender: Male
  • Blah
Re: Chem paper 3 help!!
« Reply #4 on: May 28, 2009, 04:47:43 am »
Quote from: jkiam11 on May 28, 2009, 04:25:02 am
Which paper did they ask you to test a random gas? There is nothing about identifying sulphur dioxide in the syllabus.
Yes well theres nothing about knowing hydrogen peroxides catalyst in the syllabus either. And it came in paper 6.
Logged

Offline jkiam11

  • Newbie
  • *
  • Posts: 23
  • Reputation: 1
Re: Chem paper 3 help!!
« Reply #5 on: May 28, 2009, 05:00:59 am »
I didn't do paper 6 so I wouldn't know but was your question abt hydrogen peroxides a suggest or deduce question?
Logged

Offline chaosking

  • SF Senior Citizen
  • *****
  • Posts: 856
  • Reputation: 53516
Re: Chem paper 3 help!!
« Reply #6 on: May 28, 2009, 06:14:39 am »
check the syllabus
Logged
You were not born a winner, and you were not born a loser. You are what you make yourself be.

Offline Shogun

  • SF Geek
  • ****
  • Posts: 495
  • Reputation: 25
  • Gender: Male
  • the heavens cry within the arrival of the best
Re: Chem paper 3 help!!
« Reply #7 on: May 28, 2009, 07:37:53 am »
u gotta learn test of cations(zinc,aluminium,copper(II),calcium.iron(II),iron(III),ammonium,etc) and test of anioins(nitrates,carbonates,sulphates,chlorides,etc) and test of gasses(oxygen,hydrogen,carbon dioxide,chlorine and ammonia)
then u gotta learn how to test unsaturated hydrocarbon(with double bonds eg:ethene) where u have to use aqueous redish-brown bromine water which decolourizes when added to unsaturated hydrocarbon..

and thts all i guess
Logged
one who masters both the pen and paper is indeed a true warrior.

\m/metal head\m/

Offline ~M.J~

  • SF Geek
  • ****
  • Posts: 306
  • Reputation: 20
  • Gender: Male
  • High Altitude Is My Attitude
Re: Chem paper 3 help!!
« Reply #8 on: May 28, 2009, 07:38:17 am »
TEST FOR SULPHUR DIOXIDE?
that can come
my teacher gave it in our mocks
answer??
Logged

Offline Shogun

  • SF Geek
  • ****
  • Posts: 495
  • Reputation: 25
  • Gender: Male
  • the heavens cry within the arrival of the best
Re: Chem paper 3 help!!
« Reply #9 on: May 28, 2009, 07:39:55 am »
@mj wat was the test for sulphur dioxide?
Logged
one who masters both the pen and paper is indeed a true warrior.

\m/metal head\m/

Offline ~M.J~

  • SF Geek
  • ****
  • Posts: 306
  • Reputation: 20
  • Gender: Male
  • High Altitude Is My Attitude
Re: Chem paper 3 help!!
« Reply #10 on: May 28, 2009, 07:41:47 am »
Got it wrong in the exams!  ;D
Logged

Offline Shogun

  • SF Geek
  • ****
  • Posts: 495
  • Reputation: 25
  • Gender: Male
  • the heavens cry within the arrival of the best
Re: Chem paper 3 help!!
« Reply #11 on: May 28, 2009, 07:43:15 am »
i dont think there was any test for so2 cuz we never came across it or maybe we did,ijust forgot
Logged
one who masters both the pen and paper is indeed a true warrior.

\m/metal head\m/

Offline godfather93

  • SF Senior Citizen
  • *****
  • Posts: 720
  • Reputation: 799
  • Gender: Male
  • Tomorrow is a day that changes everyday
Re: Chem paper 3 help!!
« Reply #12 on: May 28, 2009, 07:45:53 am »
sulphur dioxide turns acidified potassium dichromate from orange to green.
Logged

Offline ~M.J~

  • SF Geek
  • ****
  • Posts: 306
  • Reputation: 20
  • Gender: Male
  • High Altitude Is My Attitude
Re: Chem paper 3 help!!
« Reply #13 on: May 28, 2009, 07:47:08 am »
Thanx 4 the answer
but may i ask in which chapter is that in!....
Logged

Offline godfather93

  • SF Senior Citizen
  • *****
  • Posts: 720
  • Reputation: 799
  • Gender: Male
  • Tomorrow is a day that changes everyday
Re: Chem paper 3 help!!
« Reply #14 on: May 28, 2009, 07:48:42 am »
Quote from: ~M.J~ on May 28, 2009, 07:47:08 am
Thanx 4 the answer
but may i ask in which chapter is that in!....
in my book it's not in a chapter but all the gas tests r given at the end of the book.
Logged
Pages: [1] 2   Go Up
« previous next »