Combined Science Practical

• Y_Shun

  17 Oct 07, 21:05

  Good luck to everybody!
  
  Things to bring:
  IC
  Entry Proof
  Test-tubes(OPTIONAL)
  Flexicurve
  Long-ruler
  Geometrical set
  Calculator
  Books(if you are at the first shift etc...need to be quarantined, use the time wisely)
  
  Anything else to bring?
• hiphop2009

  17 Oct 07, 22:17

  thankyou for starting this thread.
  
  sure will benefit many forumnites
  
  
• unclebutcher

  17 Oct 07, 22:26

  good luck! be careful with the washing of pipette and burette...can affect your results
• TrixCereals

  17 Oct 07, 22:28

  Btw, white powder most likely CO2?
  Black solid most likely hydrogen cos metal oxide isit?
  
  Nervous.
• rain-coat

  17 Oct 07, 23:19

  Originally posted by TrixCereals:

  Btw, white powder most likely CO2?
  Black solid most likely hydrogen cos metal oxide isit?
  
  Nervous.

  What? Catch no ball... say clearer leh.
  
  White ppt in LIMEWATER is CO2. However, in NAOH or ammonium white ppt can be other things eg. Ca2+.
  
  I dont get the part about hydrogen sorry
• Darkness_hacker99

  17 Oct 07, 23:38

  Originally posted by Y_Shun:
  Good luck to everybody!
  
  [b]Things to bring:
  IC
  Entry Proof
  Test-tubes(OPTIONAL)
  Flexicurve
  Long-ruler
  Geometrical set
  Calculator
  Books(if you are at the first shift etc...need to be quarantined, use the time wisely)
  
  Anything else to bring?[/b]

  This list is for Science (Chemistry, Physics) right?
  
  I guess for Science (Chemistry, Biology), there is no need to bring mathematics equipments like flexicurve or geometrical set.
  
  
• Darkness_hacker99

  18 Oct 07, 00:25

  Originally posted by rain-coat:

  What? Catch no ball... say clearer leh.
  
  White ppt in LIMEWATER is CO2. However, in NAOH or ammonium white ppt can be other things eg. Ca2+.
  
  I dont get the part about hydrogen sorry

  The white ppt. you got from passing CO2 to Limewater is Calcium carbonate.
• metalcar

  18 Oct 07, 02:57

  Originally posted by TrixCereals:

  Btw, white powder most likely CO2?
  Black solid most likely hydrogen cos metal oxide isit?
  
  Nervous.

  i 10pm slp.. struggle until now still cannot slp.. anyway...
  
  i tink u mean if they give white powder.. wad gas will most likely be given out..
  so imo.. if they give white powder.. 1st gas to test is CO2... 2nd gas to test is H2...
  
  if they give silvery powder.. 1st gas to test is H2.. 2nd gas to test is C02...
  
  eh wish u gd luck later !
• Y_Shun

  18 Oct 07, 15:38

  Physics graph -> curve
  
  Damn! I never fasten my papers together with the booklet but I wrote my name on it...should be okay right?
  
  1 mistake that few people did was to do everything on 1 piece of paper.
  
  Chemistry, salt -> Zinc carbonate(wrote Pb, then change to Al, then change to Zn )
  Think I won't get good marks because my observations was like all wrong
• metalcar

  18 Oct 07, 16:19

  Originally posted by Y_Shun:

  Physics graph -> curve
  
  Damn! I never fasten my papers together with the booklet but I wrote my name on it...should be okay right?
  
  1 mistake that few people did was to do everything on 1 piece of paper.
  
  Chemistry, salt -> Zinc carbonate(wrote Pb, then change to Al, then change to Zn )
  Think I won't get good marks because my observations was like all wrong

  ya lo i oso do everytin on 1 piece of paper.. i finish untill 55 degree liao lei.. den i realise sumtin is terribly wrong.. ... ... den redo everyting.. hais.. sian..
  den skip ehre n dere.. hais.. ez pratical oso can screw up lol
• elitefella

  18 Oct 07, 17:52

  Zinc carbonate is the salt right?
• Y_Shun

  18 Oct 07, 19:07

  Originally posted by elitefella:

  Zinc carbonate is the salt right?

  yep.
• Darkness_hacker99

  18 Oct 07, 21:16

  Originally posted by elitefella:

  Zinc carbonate is the salt right?

  Actually I am supposed to take the Practical today, but didn't.
  
  Hahaz. I heard from my sister that the salt is Zinc Carbonate. She wrote Calcium Oxide. *Faint*
• rain-coat

  18 Oct 07, 23:39

  Originally posted by Darkness_hacker99:

  The white ppt. you got from passing CO2 to Limewater is Calcium carbonate.

  Sorry if i was not clear. White ppt as in the gas tested is CO2.
• Darkness_hacker99

  18 Oct 07, 23:39

  Originally posted by rain-coat:

  Sorry if i was not clear. White ppt as in the gas tested is CO2.

  Yar.
• Sienx

  19 Oct 07, 14:05

  Originally posted by metalcar:

  ya lo i oso do everytin on 1 piece of paper.. i finish untill 55 degree liao lei.. den i realise sumtin is terribly wrong.. ... ... den redo everyting.. hais.. sian..
  den skip ehre n dere.. hais.. ez pratical oso can screw up lol

  
  
  i do liao finish bio and physics left half hourr.. was cutting the specimens plants the teacher gave LOLS
• ceecookie

  19 Oct 07, 20:10

  Originally posted by Darkness_hacker99:

  Actually I am supposed to take the Practical today, but didn't.
  
  Hahaz. I heard from my sister that the salt is Zinc Carbonate. She wrote Calcium Oxide. *Faint*

  ZZ..i wrote Zinc Chloride...tot gt chlorine.
  
  Chem part very difficult,coupled with less time since i spent too much time on the physic part.
• unclebutcher

  19 Oct 07, 23:22

  aiya. its over. but careful. practical is my ggxx. make me a2 for pure chem last yr.
• soulwinner

  19 Oct 07, 23:24

  Bring extra pen.. I remember my classmate bought only one pen and i suddenly mulfunction... luckily the chief examiner is nice and lend him one...
• Scania N113CRB luver

  19 Oct 07, 23:59

  Originally posted by ceecookie:

  ZZ..i wrote Zinc Chloride...tot gt chlorine.
  
  Chem part very difficult,coupled with less time since i spent too much time on the physic part.

  Actually its easy .
  
  Since the first experiment require you to test for carbon dioxide , reuse the apparatus for the second gas test . If you cant get for carbon dioxide , dhen use other tests. Heng i tested positive for carbon dioxide. Saved valuable time.