Chemistry 42....how did it go?..expected GT

[Sannikutti]

One indication that oxygen is not very soluble in water is that you will collect it over water in ur P5 experiments. If it were soluble in water, then it would all dissolve, and you wouldn't have any to test. But the biggest experiment of all is to point out the planetEarth. Earth has a huge volume devoted to water, and an atmosphere of 21% oxygen. If oxygen were very soluble in water, it would all dissolve, and there wouldn't be any students to do experiments nor teachers to grade them. ;p

True that but oxygen will dissolve under the 101 kpa partly and better to know that it is in equilibrium form between its aques and gaseous states.

 

[Ahmed Tariq]

I'm pretty sure -OH is right, there isn't any other group there in the molecule which is likely to get broken down somehow.

ATP with water? Nah

And ofcourse, oxygen is soluble in water, LOL! How do you think the aquatic life exists? I'm not sure about my answer too, well lets see hope for the best

0 for [co] 1 for [complex ion]
mechanism 2

peg dissolves in long hydrocarbon chain, that molecule dissolves in water coz of H bonding, part of the drug dissolves and can be easily carried around the body.

The hydrolysis of ATP is given by the equation: ATP + H2O --> ADP + Pi
For more information, kindly check the applications booklet.

 

[Sannikutti]

The hydrolysis of ATP is given by the equation: ATP + H2O --> ADP + Pi
For more information, kindly check the applications booklet.

Yes ahmad ur rite but u can write hydrolysis as well or writing aqeous also is same thing

 

[Ahmed Tariq]

Yes ahmad ur rite but u can write hydrolysis as well or writing aqeous also is same thing

Do you remember the answers to the first part of the last question in the applications section?
And the two factors affecting the NMR blah blah question?

 

[Sannikutti]

it says it's 1st order with respect to the ion and o with CO, so 1st order overall

Mr.Gooner they are saying that it is 1 overall and with respect to co is 0.
After all it wont matter product or the reactent concentration because rate is change of concentration over delta time.
So both ways its the same.Rate of formation will be negative rate of reduction in reactents.

Refer book

 

[Sannikutti]

Do you remember the answers to the first part of the last question in the applications section?
And the two factors affecting the NMR blah blah question?

The liposome one rite>
It was C then B


FACTORSS:
NATURE OF THE NUCLIE(i.e The environment of the H neuclie)

Magnetic field strenght

 

[sadman]

Guys dont kill yourself about the repeated question. It may seem repeated but a LOT of facts were changed. And dont kid yourself telling that the paper was EASY BCS it was NOT!!!!
other wise the GT would be as high as 79! Congrats to you if you score HIGH, that means u are smart.
and about the PEG question i didnt even read it properly! was is the fat soluble thingy or some other molecule? if it was polar then it will be one of the OH groups if not then the hydrocarbon chain.
ANd about the mechanism!!!!!! it wasnt 2 or 1 or 3 BCS in the rate equation it was the concentration of the PRODUCT!!!!!!!!
I would say any one who scores 80+ in this paper is good. NONE of my frnds found the paper easy
and I HOPE TO GOD, that there were printing mistakes. Some of the questions just did not make any sense. With being said
GOOD LUCK TO ALL OF YOU!!!
I hope you end up with good grades and pray for me so that i can pull my marks to 80........need it for an A* bcs for meds u need A* for admission.
Assalamu Alykum Wa Rahmatullah!
Prepare well bio bio tomorrow if u hav that

 

[Ahmed Tariq]

The liposome one rite>
It was C then B


FACTORSS:
NATURE OF THE NUCLIE(i.e The environment of the H neuclie)

Magnetic field strenght

Wasn't it B and then C? :/

 

[Sannikutti]

Do you remember the answers to the first part of the last question in the applications section?
And the two factors affecting the NMR blah blah question?

Can u tell me which questions were there
i dont remember pls

 

[Sannikutti]

Wasn't it B and then C? :/

Look they said hyrophilic mosture something so that will be attached to the phosphate part of phospholipid so it will be C.
Then they said something viamins that will go to the B(Lipid part of liposome).

A will be least approperiod place because the drug attached is exposed to outer environment so can be hydrolysed in stomach or react in part of body.

 

[sadman]

The liposome one rite>
It was C then B


FACTORSS:
NATURE OF THE NUCLIE(i.e The environment of the H neuclie)

Magnetic field strenght

I wrote one of the factors is the the energy supplied to it. Can it be correct? i couldnt remember the proton environ ment, which makes much more sense now

 

[Sannikutti]

I wrote one of the factors is the the energy supplied to it. Can it be correct? i couldnt remember the proton environ ment, which makes much more sense now

Ya u can mention that also ur rite too

Btw what u wrote for liposome one>

 

[sadman]

Ya u can mention that also ur rite too

Btw what u wrote for liposome one>

I LOOOOOOOOOOVEEEE YOU !!!!!!!!!!
i dnt really remember
all i remembered that the fat soluble thingy was suppose to be in the hydrocarbon part which i think is B and then water loving C

 

[Sannikutti]

I LOOOOOOOOOOVEEEE YOU !!!!!!!!!!
i dnt really remember
all i remembered that the fat soluble thingy was suppose to be in the hydrocarbon part which i think is B and then water loving C

Good luck for ur exam

Bio paro

 

[MER]

Did anyone get 0.0560 or something as the concentration of A in the electrochemistry/organic henna question?
also, what was used to reduce that compound? A strong reducing agent like LiALH4 right? because NaBH4 is too weak Im assuming

Do you remember how much mark the electrochemistry concerning A, was worth? The calculation question only.

 

[Sannikutti]

Wasn't it B and then C? :/

Some thing like this http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s10_qp_41.pdf
question came for liposome is there in this passt paper
They asked hyrophillic drug can be attacehd to C and hydrophobic to B In our paper it said hydrophilic moisturiser so it goes to C
and some fat soluble vitamine in B hope this helps.

 

[Sannikutti]

Do you remember how much mark the electrochemistry concerning A, was worth? The calculation question only.

It was 3 marks only calculation

 

[Sannikutti]

Yeah, the amide was right next to the ester group

Ya there was an amid but many people i think forgot to see because it was like proline form the cyclic amino acid type.

And for reduction u can use NaBH4 and LiAlH4 because NaBH4 can reduce ketones and aldehydes and since it was a ketone it could be reduced by NaBH4
You can use LiAlH4 also,Because it can reduce all of them including ester acid and ketone as well as aldehyde

Btw what was liposome one B then C or C then B?

 

[ying27kia]

Do you guys remember about dot and cross diagram of CO.
Is it double bond or triple bond?
I draw a double bond.

 

[Sannikutti]

Do you guys remember about dot and cross diagram of CO.
Is it double bond or triple bond?
I draw a double bond.

Its triple bond with one of them dative from oxygen to carbon