Chemistry: Post your doubts here!

[GCE As and a level]

take ur time but just tell it before the paper

20 Use of the Data Booklet is relevant to this question.

A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodium
hydroxide. The two organic products of the hydrolysis are separated, purified and weighed.

Out of the total mass of products obtained, what is the percentage by mass of each product?
A 32.4 % and 67.6 %
B 38.3 % and 61.7 %
C 42.3 % and 57.7 %
D 50.0 % and 50.0 %

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_12.pdf Q20

 

[MYLORD]

20 Use of the Data Booklet is relevant to this question.

A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodium
hydroxide. The two organic products of the hydrolysis are separated, purified and weighed.

Out of the total mass of products obtained, what is the percentage by mass of each product?
A 32.4 % and 67.6 %
B 38.3 % and 61.7 %
C 42.3 % and 57.7 %
D 50.0 % and 50.0 %

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_12.pdf Q20

thnk u soooooooooooooooooooo much brother
u r THE BEST !!!!

 

[MYLORD]

20 Use of the Data Booklet is relevant to this question.

A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodium
hydroxide. The two organic products of the hydrolysis are separated, purified and weighed.

Out of the total mass of products obtained, what is the percentage by mass of each product?
A 32.4 % and 67.6 %
B 38.3 % and 61.7 %
C 42.3 % and 57.7 %
D 50.0 % and 50.0 %

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_12.pdf Q20

ANY LAST WORDS UNTIL THE PAPER ???!!!

 

[GCE As and a level]

ANY LAST WORDS UNTIL THE PAPER ???!!!

Yes
RELAX
READ
UNDERSTAND
SOLVE
PRAY FOR ME
WE'LL DISCUS P11 AFTER WE ARE DONE
BEST OF LUCK SISTER

 

[MYLORD]

Yes
RELAX
READ
UNDERSTAND
SOLVE
PRAY FOR ME
WE'LL DISCUS P11 AFTER WE ARE DONE
BEST OF LUCK SISTER

GOOD LUCK TO U TOOOO !!!!

 

[maq1996]

hey guys what do you reckon would be the gt of chem paper 12?

 

[..sacrifice4Revenge..]

hey guys what do you reckon would be the gt of chem paper 12?

28 or 29

 

[maq1996]

it wasn't that difficult, but well, I've solved easier papers, so kinda agree with u

 

[kingo44]

dammm easyuyy

 

[kingo44]

its tricky eliminationm reaction hbr

 

[MariamMalik]

what was the answer for that question in paper 12 where we had to find the C-C bond energy in cyclopropane? and question 35 in which they were asking what happens when Ag Cl is added to ammonia, was the second line where they said that ammonia is acting as a bronsted lowry base correct?

 

[maq1996]

what was the answer for that question in paper 12 where we had to find the C-C bond energy in cyclopropane? and question 35 in which they were asking what happens when Ag Cl is added to ammonia, was the second line where they said that ammonia is acting as a bronsted lowry base correct?

350 fr first question and the 2nd one, I chose A

 

[kingo44]

second one is only D

 

[Rohan O]

I chose A or B for the second one don't remember the third option though

 

[MariamMalik]

i did D for the 2nd one and for the first i did 351

 

[Asad rehman]

what about the question saying for ethandioic acid and ethanol reaction?

 

[kingo44]

ya i wrote C

 

[Saad Shahid]

Salam guys
guys by mistake I signed my answer sheet with my pen..
I asked my invigilator about that, he said that cut it amd sign it with pencil again..
I did the same.. will It cause any peroblem? reply soon plz..

 

[ZaqZainab]

Salam guys
guys by mistake I signed my answer sheet with my pen..
I asked my invigilator about that, he said that cut it amd sign it with pencil again..
I did the same.. will It cause any peroblem? reply soon plz..

we are suppose to sign it with pen always
my invigilator tole me to sign all of them with pen even last year
But i don't thing there will be a problem

 

[♣♠ Magnanimous ♣♠]

we are suppose to sign it with pen always
my invigilator tole me to sign all of them with pen even last year
But i don't thing there will be a problem

not with pen :/ we have to sign with pencil