Chemistry: Post your doubts here!

[Dukeofwin]

How to differentiate between addition and condensation polymer?

 

[A star]

Any important topics for tommorows p42???

prganic inorganic physical electro and applications

 

[A star]

How to differentiate between addition and condensation polymer?

amide/ester linkage

 

[Namehere]

Amino Acid chains. C=O And N-H. Hydrogen bonds between O and N. And guess what! The O isn't directly attached to H!




You're very right here. Any other day, I'd have said you were right and Hydrogen Bonds exist b/w CH3F and H2O. BUT, not today. Not while you're still an A Level student. Not till you're done with P4 tomorrow. The A Level syllabus is limited to, rather stupidly, NOF bonded DIRECTLY to H with one exception of aa's in Applications. So, as far as questions go, you're not gonna use any logic. You're not gonna use your brain. You're going to see if N O or F is directly attached to H or not.

And they call themselves CIE...

 

[Rahma Abdelrahman]

For R-COCl, Ar-Cl and RCl, which is easier to hydrolyse and why? I know Ar-Cl is the most difficult due to interaction between lone electron pairs of Cl and delocalised pi electrons of the benzene ring. But, what about the other two?

 

[xXGTZXx]

For R-COCl, Ar-Cl and RCl, which is easier to hydrolyse and why? I know Ar-Cl is the most difficult due to interaction between lone electron pairs of Cl and delocalised pi electrons of the benzene ring. But, what about the other two?

For R-COCl it is the easiest as the carbon atom attached to Cl is Extremely +ve beascause of the polar C--O bond and C--CL bond, both Cl and O are highly electronegative elements
For RCL only one electronegative element and there are no other interactions with it

 

[Rahma Abdelrahman]

For R-COCl it is the easiest as the carbon atom attached to Cl is Extremely +ve beascause of the polar C--O bond and C--CL bond, both Cl and O are highly electronegative elements
For RCL only one electronegative element and there are no other interactions with it

So R-COCl is easier to hydrolyse right?
Thanks.

 

[xXGTZXx]

So R-COCl is easier to hydrolyse right?
Thanks.

R-COCl > RCl > Ar-Cl

So yes your right

 

[AbbbbY]

It's official. I'm screwed. I have forgotten everything. The one subject I had hopes of getting an A* in now see's me trying to just reach to an A, and even that seems like a huge task. FML.

Good luck, everyone!

 

[chocolate_girl]

https://www.whatdotheyknow.com/request/195694/response/490695/attach/4/A Level Chemistry 9701 November 2013 Grade Thresholds PDF.pdf

Thanks

 

[Manobilly]

It's official. I'm screwed. I have forgotten everything. The one subject I had hopes of getting an A* in now see's me trying to just reach to an A, and even that seems like a huge task. FML.

Good luck, everyone!

you wont ,trust me you have that feeling before an exam and you do good in it .I have the same feeling too.

 

[Saad Sheikh]

hi, can any one tell me how to solve Q2/d/ii of 9701/42/0/n/09?
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w09_qp_42.pdf

 

[Saad Sheikh]

no 1?

 

[Farez]

hi, can any one tell me how to solve Q2/d/ii of 9701/42/0/n/09?
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w09_qp_42.pdf

 

[Namehere]

It's official. I'm screwed. I have forgotten everything. The one subject I had hopes of getting an A* in now see's me trying to just reach to an A, and even that seems like a huge task. FML.

Good luck, everyone!

Do not worry! You are not alone ! Nah... just kidding, we will do fine! Usually the best chemists struggle the most, simply because they know the most!

 

[Saad Sheikh]

Thanks but i still i cant understand it completely. does it have anything to do with such a high kc value? meaning that most of it(Ag+) has formed a complex?

 

[Namehere]

Thanks but i still i cant understand it completely. does it have anything to do with such a high kc value? meaning that most of it(Ag+) has formed a complex?

You just assume that when you previously calculated the [Ag+], it is the same as the one you are using now. How else could you do it?

 

[Saad Sheikh]

You just assume that when you previously calculated the [Ag+], it is the same as the one you are using now. How else could you do it?

yeah...........but. oh ok then

 

[AbbbbY]

Do not worry! You are not alone ! Nah... just kidding, we will do fine! Usually the best chemists struggle the most, simply because they know the most!

The fact that my exam is in 2 hours or so and I don't know applications speaks volumes

 

[goodluckayesha]

In organic wht does Na2CO3 react with to produce CO2?