Chemistry Revision

[SuperXDE]

Re: Chemistry Paper 6 Revision

Thanks alot, Your the best !!!! Is there anything else we should know because I also have another exam on the same day with Edexcel (Human Biology) and I don't want to waste time.

You're welcome , Just pray for me that I understand what I am copying o.o..... so far I can't get the organic chromatography stuff

Ehm ehm...

Here is a summary for what you must Press on , ordered according to Exam questions :

1. Experimental Apparatus

• Experiments and practical work concerning volume ,rate of reaction and temperature ( Electrolysis is included )

• Identifying with tests , like this topic

• Types of reactions ( Displacement , redox , exothermic , substitution w/e )

• Rate of reaction and what affects it ( Temperature , Concentration and surface area [ usually Powder and ribbon ] )

• Acidity and Alkalinity of a substance ( Check paper 6. October / November 2009 , Question No.5 )

• Organic stuff and chromatography like the one I was asking 'user' about.

 

[SuperXDE]

Re: Chemistry Paper 6 Revision

(a)Put the leaf in the mortar and crush it using the pestle. Put the crushed leaf in a suitable solvent to dissolve in the coloured pigments
(b)Place a concentrated spot of liquid extract at the centre of baseline drawn 1-2 cm above the end of filter paper. Dip the paper in the solvent with the level of solvent below the baseline. The solvent rises up the paper producing the spots. The spots indicate the number of coloured pigments.
this is what i wrote hope this helps

Hmm , so the Mortar and the Pestle to crush the leaf , the solvent is to dissolve the coloured pigments in order to be able to do chromotography ? as in filling the first question?

Psst , the Topic has been updated , please check ^.^

Yeah right dissolving is done to do chromatography

Perfect~! > If I finish maths now , I will have some time to play MMORPGs...

 

[user]

Re: Chemistry Paper 6 Revision

well please help me with the part of organic chemistry needed for paper 6 including fermentation and cracking
thnx in advance

 

[SuperXDE]

Re: Chemistry Paper 6 Revision

well please help me with the part of organic chemistry needed for paper 6 including fermentation and cracking
thnx in advance

Including what and what? I don't know them ... atleast not yet.. I will try digging the whole chemistry syllabus today and getting what is essential.

 

[user]

Re: Chemistry Paper 6 Revision

i think u should do that soon at least just know what topics need to be done cracking and fermentation both come under organic chemistry!!and according to my teacher they might ask some questions on these topics in paper 6 like conditions..

 

[SuperXDE]

Re: Chemistry Paper 6 Revision

i think u should do that soon at least just know what topics need to be done cracking and fermentation both come under organic chemistry!!and according to my teacher they might ask some questions on these topics in paper 6 like conditions..

however , you can be able to score A* without answering a single past paper , Just by looking at all the 18 papers , and taking whats common between them , and that is the most probable to come in the Exam .. that is what I did for English , and Physics , in Physics I solved only 2 or 3 papers to be honest... However for the exam , it is not important how many papers you answer , it is how much you know inside the limits of the Exam , and what is more important How much knowledge do you own . But for maths , You need to answer as much Question Papers as possible , if it possible to EAT the book , the past papers , the exam and the invigilator , eat them!

 

[AHMED -_-]

Re: Chemistry Paper 6 Revision

are we supposed to know the flame colors
i have never saw them in the syllabus or a question about them in past papers

???????????????????????

 

[SuperXDE]

Re: Chemistry Paper 6 Revision

are we supposed to know the flame colors
i have never saw them in the syllabus or a question about them in past papers

???????????????????????

Habeeby , if they are not in the syllabus , then ignore them .

 

[Pierre Samy]

Re: Chemistry Paper 6 Revision

Dear Super XDE ( sheirf )
thanks for respond to my request and bring the list of testes and colours
flame colours is not to be leant expect to idnetify the type of flame ( pure,compund, mixed with elment ) so u need to know which elemnt is to be burnt giving wut flame colour only for paper 6 and thats confirmed...

 

[larina]

Re: Chemistry Paper 6 Revision

flame colors can come in the exam.....e.g. when they ask what do you observe at the end of the experiment?? :shock:

 

[shaz]

Re: Chemistry Paper 6 Revision

Right. Thanks for the tests.

Umm, is flame tests included?

 

[Abdullatif Dablouk]

Re: Chemistry Paper 6 Revision

Btw man..for the test for protein KOH may be used instead of NaOH and then two drops of CuSO4 are added (same result obtained)
u could also include the emulsion or ethanol test for fats

btw it is a very kind thing of you 2 post this nd thnks alot

 

[SuperXDE]

Re: Chemistry Paper 6 Revision

Right. Thanks for the tests.

Umm, is flame tests included?

Check your syllabus

Btw man..for the test for protein KOH may be used instead of NaOH and then two drops of CuSO4 are added (same result obtained)
u could also include the emulsion or ethanol test for fats

btw it is a very kind thing of you 2 post this nd thnks alot

Oh , i just copied from my book , Thanks for the advice , I will try adding it later because :mrgreen: I have to grind for tomorrow and after tomorrow now.

 

[Zara AYK]

Re: Chemistry Paper 6 Revision

Thanks .. and i wish you all , all the best in this exams!

 

[SuperXDE]

Re: Chemistry Paper 6 Revision

Thanks .. and i wish you all , all the best in this exams!

Thanks Zara , if you need anything XtremePapers is your 3rd home ( School is the 2nd , Home is the 1st xD )

 

[polo]

Re: Chemistry Paper 6 Revision

so flame tests not worth learning

 

[SuperXDE]

Re: Chemistry Paper 6 Revision

so flame tests not worth learning

I will repeat it again , check your syllabus , if it is there then study it , if not then don't =.=

 

[kazamodia]

Re: Chemistry Paper 6 Revision

"all nitrates are insoluble" ????

how come this??? it should be all nitrates are soluble

 

[user]

Re: Chemistry Paper 6 Revision

yes truly right Larina has probably made a mistake

 

[Romeo10]

Re: Chemistry Paper 6 Revision

FLAME TESTS ARE NOT INCLUDED DDDDDDDDDDDD