chemistry help

[Ahmed-Azurus]

when studying for paper 6 should we learn all of the lessons?

is there any effect of using powdered catalyst other than lumps of the catalyst?

in recent papers they often compared same acid with different solutions then they asked what is difference between them
the answer carried 2 marks . mark scheme states we ahould write different concentrations with different no of collisions
BUT in old papers they compared different acids and asked same question. so whats the answer?
different strengths and what else


can anyone list for me the maximum no of coloured compounds likely to be learnt and their rules of statin their colour

Thanks to evry1 who will help

 

[SuperXDE]

Focus on the seperation methods between mixtures and compounds. , they are important , very important and ofcourse the rate of reaction stuff.

Check your Chemistry textbook , it is should to have a chapter about Seperation between both , Mixtures and compounds... , and to test for negative , positive ions , gases and testing for metal ions using flame ( coloured flame appears )

There is a difference in using Lumps of the catalyst and using powder , in a powder , the molecules are smaller which means that there is a high rate of collision to happen and it will be diffused around which will without doubt make the reaction faster.

 

[Ahmed-Azurus]

thanks super xde

the truth is i mainly want a reply on my last 2 questions any ideas?