• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Chemistry: Post your doubts here!

angelgirl:)

angelgirl:)

Messages
532
Reaction score
151
Points
53
How does concentrated sulfuric acid behave when it reacts with sodium chloride?
A as an acid only
B as an acid and oxidising agent
C as an oxidising agent only
D as a reducing agent only
 
T

TheMan123

Messages
103
Reaction score
48
Points
38
An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3
of water. When equilibrium was established, there was 0.44mol of Ag+(aq) in the mixture.
Ag+(aq) + Fe2+(aq) --> Ag(s) + Fe3+(aq)

What is Kc?

A. 0.35 B. 0.62 C. 1.62 D. 2.89

I got C as my answer but the correct one is D, can anyone explain how to get D?

Edit: Oops I missed out the question! I just added it
 
saudha

saudha

Messages
198
Reaction score
47
Points
28
TheMan123 said:
An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3
of water. When equilibrium was established, there was 0.44mol of Ag+(aq) in the mixture.
Ag+(aq) + Fe2+(aq) --> Ag(s) + Fe3+(aq)

A. 0.35 B. 0.62 C. 1.62 D. 2.89

I got C as my answer but the correct one is D, can anyone explain how to get D?
Click to expand...

wht is the Q
 
1

1357913579

Messages
466
Reaction score
101
Points
53
étudiante said:
can u give me the link please? i'll try to... its a good revision :p
Click to expand...
please some one help as soon as possible
oct/nov 2010 second variant numer-7,18,31,34,36. soory for so much question but what can i do the paper semmed hard for me got these mistakes and unfortunately coudnt resolve any of my mistakes:(

thanks for helping all xpc members:)
http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w10_qp_12.pdf
this was what i posted there.
thanks for helping.:)
 
étudiante

étudiante

Messages
2,951
Reaction score
17,783
Points
523
1357913579 said:
please some one help as soon as possible
oct/nov 2010 second variant numer-7,18,31,34,36. soory for so much question but what can i do the paper semmed hard for me got these mistakes and unfortunately coudnt resolve any of my mistakes:(

thanks for helping all xpc members:)
http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w10_qp_12.pdf
this was what i posted there.
thanks for helping.:)
Click to expand...
its alright :)
can u please give me a direct link to the paper itself cuz i cant find it atm... den i'll try 2 solve dem :)
 
T

TheMan123

Messages
103
Reaction score
48
Points
38
I asked this question already, but just thought I post it again since we're on a new page.

An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3
of water. When equilibrium was established, there was 0.44mol of Ag+(aq) in the mixture.
Ag+(aq) + Fe2+(aq) --> Ag(s) + Fe3+(aq)

What is Kc?

A. 0.35 B. 0.62 C. 1.62 D. 2.89

I got C as my answer but the correct one is D, can anyone explain how to get D?
 
étudiante

étudiante

Messages
2,951
Reaction score
17,783
Points
523
TheMan123 said:
I asked this question already, but just thought I post it again since we're on a new page.

An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3
of water. When equilibrium was established, there was 0.44mol of Ag+(aq) in the mixture.
Ag+(aq) + Fe2+(aq) --> Ag(s) + Fe3+(aq)

What is Kc?

A. 0.35 B. 0.62 C. 1.62 D. 2.89

I got C as my answer but the correct one is D, can anyone explain how to get D?
Click to expand...
I'm not getting any of the options :eek:
wat method r u using please?
 
Z

Zsiddiqui

Messages
52
Reaction score
46
Points
28
TheMan123 said:
I asked this question already, but just thought I post it again since we're on a new page.

An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3
of water. When equilibrium was established, there was 0.44mol of Ag+(aq) in the mixture.
Ag+(aq) + Fe2+(aq) --> Ag(s) + Fe3+(aq)

What is Kc?

A. 0.35 B. 0.62 C. 1.62 D. 2.89

I got C as my answer but the correct one is D, can anyone explain how to get D?
Click to expand...
even i am getting option C. Can you tell me which year paper is it ?
 
T

TheMan123

Messages
103
Reaction score
48
Points
38
Zsiddiqui said:
HELP Please :/
View attachment 8856
Click to expand...
2. Total Flask Volume=5+10= 15dm3=15/1000 m3
Next work out the number of moles of helium and neon with pv=nRT
n=pv/RT
Since RT is constant throughout, let's make life easier by letting RT be an unknown, let's say A
For helium: n=[12000*(5/1000)]/A
For Neon: n=[6000*(10/1000)]/A
Total n=120/A

To find total P, use pv=nRT=nA

pV=nA
p=nA/V
p=[(120/A)*A]/(15/1000)
p=8000Pa=8kPa
 
T

TheMan123

Messages
103
Reaction score
48
Points
38
Zsiddiqui said:
HELP Please :/
View attachment 8856
Click to expand...
I answered your first question, here is the next one:
When you polymerise, you start with many monomers to make one or a few polymers, because you are combining monomers.
so if you start with one mole of monomers, you combine them and you end up with less monomers, therefore the answer could be from anything less than 1 mole to the minimum of 1 molecule, which the inverse of 6.02*10^23, option 3 of the question
 
MysteRyGiRl

MysteRyGiRl

Messages
3,063
Reaction score
1,831
Points
173
10 cm3 of hydrocarbon is burned in 70cm3 of oxygen(excess) the funal gaseous mixture contains 30cm3 of ccarbon dioxide n 20 cm3 of unreacrted oxygen.whats the formula of hydrocarbon?
a) C2H5 b)C3H6 c)C3H8 d)C4H10
hows it c? these r supoosed 2 be easy questions bt cant get the answers:cry:
 
You must log in or register to reply here.
Top