Chemistry: Post your doubts here!

[Wkhan860]

DOES the ' equilibrium concentration' of compounds remain aame if volume is increased?

 

[awesomaholic101]

DOES the ' equilibrium concentration' of compounds remain aame if volume is increased?

Yes, as only temperature changes result in a change of Kc value ....
but i am not 100% sure so check with someone else too.

 

[Falconwing]

Usually we use 100 as the Abundance right? then why in this case we have to use 10? Can you pls clarify it further

Sorry for the late reply, I doubt you need this anymore =P But, you only use the total abundance. For example if the relative abundance was 2 and 7, you will divide by 9.

 

[Metanoia]

DOES the ' equilibrium concentration' of compounds remain aame if volume is increased?

Do you mean equilibrium concentration or equilibrium constant? And what is meant by "increasing of volume"?

 

[Wkhan860]

Do you mean equilibrium concentration or equilibrium constant? And what is meant by "increasing of volume"?

Concentration of reactants and prdoucts at equilibrium....the qtn was thtbthe vol was inc frm 1 dm to 2 dm

 

[asadalam]

hw was the paper?

Did you give 11 or 12?i gave 12

 

[Metanoia]

Concentration of reactants and prdoucts at equilibrium....the qtn was thtbthe vol was inc frm 1 dm to 2 dm

Did this come from an actual question? If so, do post the whole question.

 

[BhaiArshad]

DOES the ' equilibrium concentration' of compounds remain aame if volume is increased?

Yes Kc is only affected by Temperature.
http://www.chemguide.co.uk/physical/equilibria/change.html

 

[Wkhan860]

Did this come from an actual question? If so, do post the whole question.

It came ij tdays P11...so I snt have it

 

[Falconwing]

Did this come from an actual question? If so, do post the whole question.

It came on today's paper, p11. Personally, I thought that option was wrong ( I don't really remember tho =P) but I'm not sure ^^

 

[Wkhan860]

Yes Kc is only affected by Temperature.
http://www.chemguide.co.uk/physical/equilibria/change.html

Thnks
but the qtn was tht does the equilibrium concebtrations of reactants nd products change...not the Kc value
Theres a possibility tht the Kc value remains constant evn whn conc of products nd reactants change

 

[Falconwing]

Thnks
but the qtn was tht does the equilibrium concebtrations of reactants nd products change...not the Kc value
Theres a possibility tht the Kc value remains constant evn whn conc of products nd reactants change

There was something about the equlibrium constant increasing in the second reaction or something as well.. Do you remember it?

 

[Wkhan860]

There was something about the equlibrium constant increasing in the second reaction or something as well.. Do you remember it?

No It was tht the equi concentration of PCl5 increases not the equilibrium.constant

 

[Falconwing]

No It was tht the equi concentration of PCl5 increases not the equilibrium.constant

Oh well, I don't remember a thing! =P

 

[Hiba shahid]

How many structural isomers of that benzene one were you getting ?
And what was the answer of 3rd question CO AND CO2 one ??

 

[Hiba shahid]

And also in organic chemistry the number of moles of carbon dioxide and water produced ??

 

[awesomaholic101]

Did you give 11 or 12?i gave 12

12 me too

 

[asadalam]

12 me too

Do you remember a question where it asked for min no of carbons needed to form chiral compound?What was the ans to that?I did 7.

 

[awesomaholic101]

Do you remember a question where it asked for min no of carbons needed to form chiral compound?What was the ans to that?I did 7.

i don't remember any such question like that ... mite have been from the ones i guessed ...
hw many eggshells had to be used in 2nd question?? ... i was just calculating and time was up so i simply chose 4 ...

 

[ahmedish]

anyone here sat for paper 11? it was so hard
Please if anyone did, can we revise it?