Combined Science Practical

Y_Shun SG

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 SG

thankyou for starting this thread.

sure will benefit many forumnites

Wink

unclebutcher SG

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

TrixCereals SG

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

Nervous. Confused

rain-coat SG

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 SG

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 SG

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

metalcar SG

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 SG

Physics graph -> curve

Damn! I never fasten my papers together with the booklet but I wrote my name on it...should be okay right? Confused

1 mistake that few people did was to do everything on 1 piece of paper. Laughing

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 SG

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 SG

Zinc carbonate is the salt right?

Y_Shun SG

yep.

Darkness_hacker99 SG

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* Laughing

rain-coat SG

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

Darkness_hacker99 SG

Yar. Smile

Sienx SG

Confused Sad Sad Sad

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

ceecookie SG

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 SG

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

soulwinner SG

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 SG

Actually its easy . Laughing

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.