Biology; Chemistry; Physics: Post your doubts here!

[Yazka Shathir]

Where can I get 2000 to 2004 marking schemes on the internet? Bio, chem, phy.

 

[Jenn]

Hey people,
I am finding Moles in chemistry pretty hard. I don't know if it's just me..any suggestions?

 

[Iridescent]

Hey people,
I am finding Moles in chemistry pretty hard. I don't know if it's just me..any suggestions?

Moles are not easy for most people.
Practise as many questions as you can. Take help from the mark schemes. See at which steps you make mistakes and try clarify your doubts and rectify your mistakes.

 

[danial 234]

Moles are not easy for most people.
Practise as many questions as you can. Take help from the mark schemes. See at which steps you make mistakes and try clarify your doubts and rectify your mistakes.

my teacher made us practise moles for 1 month. n now even the a lvl stoichiometry seems easy

 

[Jenn]

my teacher made us practise moles for 1 month. n now even the a lvl stoichiometry seems easy

Wow! We just started moles in school, and it all seems pretty hard to grasp.
I don't know if it's just about the formulas.

Thanks, anyway.

 

[danial 234]

u hv to understand the ques. usually there is one trick n ques. if u got de trick , u won
understanding is vry important. dont just blindly start a question

 

[Iridescent]

my teacher made us practise moles for 1 month. n now even the a lvl stoichiometry seems easy

Exactly. If you practise enough, stoiciometry is not very hard.

 

[Ram97]

Hey people,
I am finding Moles in chemistry pretty hard. I don't know if it's just me..any suggestions?

Just try to concentrate on the question and deduce what you have to find. In moles qs. there is a lot of extra information just to confuse the students.
Focus in the class and I believe you can easily grasp it
I, myself studied moles and found it easy
If u need any help you can ask me

 

[Ram97]

Exactly. If you practise enough, stoiciometry is not very hard.

Stoiciometry is ratio and proportion and its not that difficult

 

[Iridescent]

Stoiciometry is ratio and proportion and its not that difficult

People do find it hard in the beginning. But, gradually it becomes easy as we practise.

 

[Ram97]

People do find it hard in the beginning. But, gradually it becomes easy as we practise.

Well I understood it easily

 

[Iridescent]

Well I understood it easily

Nice.

 

[Ram97]

Does any one have Chemistry Past Papers (Topic Wise)????
If yes, so can they tell me the years in which questions for Redox Reactions have come
I need it today guys (School Work)

Thanks in advance

 

[Jenn]

I am pretty much clear with the topic and formulas, the application of those formulas is where the problem lies. Anyway, Thankyou.

 

[Ram97]

I am pretty much clear with the topic and formulas, the application of those formulas is where the problem lies. Anyway, Thankyou.

Well, I think I can help you with that

 

[Jenn]

Well, I think I can help you with that

Umm, how am I suppose to explain?
Okay so, we have a question for instance, it doesn't directly ask you to find something, right? How do you determine a formula to solve that particular question? I get really confused. I don't know what to use. Which formula to apply and when..

 

[M.Omar]

Salam
I wanted to seek ur opinion abt this answer of chm atp paper as per the mark scheme..In may june 2006 in the titration question of ATP.They asked for wht is the colour of the mixture of iron(2) sulfate and iron(3) sulphate .The mark scheme reads as Colorless/green .Any ideas of how it is this color or even being colorless

 

[danial 234]

the iron (2) ions r pale green. so it cn be vry light green or colourless will also be ok

 

[M.Omar]

the iron (2) ions r pale green. so it cn be vry light green or colourless will also be ok

there r also the iron 3 ions which in aqueous r brown so mixture wud have.....

 

[M.Omar]

the iron (2) ions r pale green. so it cn be vry light green or colourless will also be ok

dani boy,Please tell wht u think wud be the answer now coz there r Fe3 ions as well