Chemistry: Post your doubts here!

[crys123]

The answer is C.

 

[daredevil]

chemistry of life is completely from AS biology. im guessing u didnt take biology. i'd suggest taking help from a classmate/friend of yours. Get somebody who took biology in AS level to explain you the chapter. Or you could try watching videos from youtube. I dont know if there is any available on this topic. But I can assure you it is a really easy chapter! Its just basic stuff.

isn't it from the applications booklet?? @snowbrood

 

[snowbrood]

isn't it from the applications booklet?? @snowbrood

yea it is in application booklet i am not a bio student for girls bio is easy but for me bio gets over my head

 

[snowbrood]

chemistry of life is completely from AS biology. im guessing u didnt take biology. i'd suggest taking help from a classmate/friend of yours. Get somebody who took biology in AS level to explain you the chapter. Or you could try watching videos from youtube. I dont know if there is any available on this topic. But I can assure you it is a really easy chapter! Its just basic stuff.

lol i am studying from 10 days yet i cant even understand two pages cytoplasm ribosomes and so much maybe because i dont know about these stuff. actually i don't get anything without intuition and intuition in chemistry of life for a student that dont study bio is difficult to get

 

[snowbrood]

isn't it from the applications booklet?? @snowbrood

hey help me tell me what how to study this chapter

 

[daredevil]

yea it is in application booklet i am not a bio student for girls bio is easy but for me bio gets over my head

heyy easy there -_- u r talking to a GIRL who cant stand BIO even having been studying it for 5 years straight :/
yh well i get it where u're standing actually ..... but i haven't done applications yet so i'm afraid i cant help u all that much. my only advice would be to consult more sources on this particular topic. see if there are any relevant lectures on Khanacademy.com and search the webb life like said before. maybe you'll get a hang of it. and i am guessing that if this is a very basic chap then it must be o levels biology stuff so just imagine that u r studying it for the first time in o levels and have to learn it or something? Good Luck... maybe in a few months wen i have done it then i can be of more help. if later on you need help with any specific concepts of this stuff then tell me /... i'll try my best to help u out =)

 

[snowbrood]

heyy easy there -_- u r talking to a GIRL who cant stand BIO even having been studying it for 5 years straight :/
yh well i get it where u're standing actually ..... but i haven't done applications yet so i'm afraid i cant help u all that much. my only advice would be to consult more sources on this particular topic. see if there are any relevant lectures on Khanacademy.com and search the webb life like said before. maybe you'll get a hang of it. and i am guessing that if this is a very basic chap then it must be o levels biology stuff so just imagine that u r studying it for the first time in o levels and have to learn it or something? Good Luck... maybe in a few months wen i have done it then i can be of more help. if later on you need help with any specific concepts of this stuff then tell me /... i'll try my best to help u out =)

believe me its not a basic stuff lol

 

[daredevil]

believe me its not a basic stuff lol

hahaha okay

 

[crys123]

ok ok sorry! i studied bio and believe me compared to what i had to study in bio, this is actually the easy one. And i said it so that you dont get scared of the chapter. coz it happened to me, somebody told me that moles is extremely hard and i ended up struggling the most with moles, for 2 years in school! I get it now and its not hard. i'll help if i can. post your questions. hope this helps a bit.

 

[crys123]

why is the ans Be and not Mg?

 

[crys123]

the ans is C. plz explain someone!

 

[strangerss]

HEY every one ,alsalum allaykom . I have a query , what is the use of the chemistry application support booklet for a2 students? am I supposed to study all the information ? hope some one can clear my doubt

 

[Kim Shaw]

hey guys, please help me with this question in equilibria. answer is C. Please explain why..
View attachment 33489

Hi...plz help me with this question! Its been a week now n no one seems to be answering it

 

[Kim Shaw]

iron tablets can be bought at chemists to supplement the diet. they contain iron(II)sulfate. which one of the following aqueous reagents could be used under suitable conditions to determine the percentage of iron in the tablets by titration?
A.ethanedioic acid B.Iodine in potassium iodide C.potassium manganate(VII) D.sodium thiosulfate
ans C..plz tell me why C and not the others..thnx

Also this one..plz plz plz!!

 

[ShreeyaBeatz]

Hey !
Please help me with this question.


The reaction between Fe3+ ions and I–
ions is an equilibrium reaction.
2Fe3+(aq) + 2I– (aq) gives 2Fe2+(aq) + I2(aq)


The concentrations at equilibrium of Fe3+(aq) and I2(aq) were as follows.
[Fe3+(aq)] = 2.0 × 10–4 mol dm–3
[I2(aq)] = 1.0 × 10–2 mol dm–3

Use these data, together with the equation to calculate the concentrations
of Fe2+(aq) and I–
(aq) at equilibrium

 

[Kim Shaw]

Hey !
Please help me with this question.


The reaction between Fe3+ ions and I–
ions is an equilibrium reaction.
2Fe3+(aq) + 2I– (aq) gives 2Fe2+(aq) + I2(aq)


The concentrations at equilibrium of Fe3+(aq) and I2(aq) were as follows.
[Fe3+(aq)] = 2.0 × 10–4 mol dm–3
[I2(aq)] = 1.0 × 10–2 mol dm–3

Use these data, together with the equation to calculate the concentrations
of Fe2+(aq) and I–
(aq) at equilibrium

According to the equation,
2moles Fe3+ react with 2 moles I-
so at equilibrium, [Fe3+]=[I-]
hence [I-]= 2.0 × 10–4 mol dm–3

Also, according to equation,
2moles Fe2+ react with 1 mole I2
so at equilibrium [Fe2+]=2[I2]
[Fe2+]=2×1.0 × 10–2 mol dm–3
=2.0 × 10–2 mol dm–3
Hope it helped

 

[Snowysangel]

why is the ans Be and not Mg?

Yeah I don't get this either.. I think it's to do with their ionization energies but i can't be sure. Could someone please answer this

 

[strangerss]

hey please can some one reply to my question about whether a2 students should memorize the chemistry application support booklet?

 

[Yash Jain]

freiends, can you please help me with following questions:-
9701_s07_qp1=> Q no. 9 and 13
9701_s08_qp1=> Q no. 5
9701_w08_qp1=> Q no. 3, 5 and 10
9701_s09_qp1=> Q no. 12
9701_w09_qp1=> Q no. 1 and 9

 

[asma tareen]

hey please can some one reply to my question about whether a2 students should memorize the chemistry application support booklet?

Arent we provided with it in exams :/???