CHEM P6

[Adahshan]

http://www.xtremepapers.me/CIE/Cambridg ... 7_qp_6.pdf

Is this right

???

 

[xIshtar]

Heat isn't right, the heat should be on the salt.. The place where they were placed is right.

 

[Adahshan]

Right, Made that mistake.

 

[Cozmo35d]

OMG what a coincidence I was just solving this question a minute ago.

 

[Adahshan]

haha

 

[ironman]

guys wat does d term "decant" mean??

 

[HorsePower]

to pour out the liquid from an insoluble solid/liquid mixture and leaving the solid behind.

 

[ironman]

another question
i was solving a question on chromatography..nd d mark scheme says:
"use of (named) solvent (1) not water"
so wat would d solvent be??

 

[TSZ]

the solvent shud be anything in which the solution is soluble

 

[ironman]

d question was:
A student investigated the green colour in grass.
The student followed these instructions.
1 Cut the grass into small pieces and crush the grass by grinding with sand and ethanol.
2 Decant the liquid.
3 Investigate which colours are present in the green solution.

Outline how the student could carry out instruction 3. You may draw a diagram to help
you answer this question.

So in dis case wat would d solvent b??

 

[RAYEDORGANISATION]

guys wat does d term "decant" mean??

i was just doing tht question....

RAY-D.org

 

[RAYEDORGANISATION]

d question was:
A student investigated the green colour in grass.
The student followed these instructions.
1 Cut the grass into small pieces and crush the grass by grinding with sand and ethanol.
2 Decant the liquid.
3 Investigate which colours are present in the green solution.

Outline how the student could carry out instruction 3. You may draw a diagram to help
you answer this question.

So in dis case wat would d solvent b??

Ethanol....

RAY-D.org

 

[tripleA95]

What does in excess mean?
And can anyone give me notes on designing an experiment please.

 

[haochen]

decant mean pouring the liquid to seperate liquid and solid (not accurate)

excess mean that the solid in the reaction is more than required at a fixed temp.


hope i helped

 

[ajmanutd]

What does in excess mean?
And can anyone give me notes on designing an experiment please.

excess means more than enough to react..

 

[ajmanutd]

best of luck every1 fr d exam tom.. :good: :good:
hopefully d paper will be easy and every1 will gt an a*...

 

[dancingmaster]

best of luck every1 fr d exam tom.. :good: :good:
hopefully d paper will be easy and every1 will gt an a*...

Yeah hopefully.

 

[haochen]

chemistry will alwayz be easy for me