-
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!
- Thread starter XPFMember
- Start date
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
White light is made up of ROYGBIV
Since they said the ion absorbs red and violet regions of the visible light, the GREEN in the middle is left to be reflected into your eyes.
- Messages
- 340
- Reaction score
- 339
- Points
- 73
Your explanations are awesome!
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
Thank you so much it means a lotYour explanations are awesome!
- Messages
- 10
- Reaction score
- 2
- Points
- 13
Can someone plz tell me the answer to this question with its explanation?
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
First write the Kc expression for this reaction:
Kc = [HI]^2 / [I2]*[H2]
We know Kc = 60 at the specified temperature.
Assume a container of 1dm^3 for simplicity:
[H2] = 2
[I2] = 0.3
Kc = 60
[HI] = sqrt(Kc*[I2]*[H2]) = sqrt(60*0.3*2) = sqrt(36) = 6mol/dm^3
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
Yes that would be wrong. The other carbon atom is neutral because it is bonded to four atoms.
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
0.1 moldm-3 solution of Fe2(SO4)3 (aq)
It will dissociate in water like this:
Fe2(SO4)3 (aq) <------> 2Fe3+ (aq) + 3SO42- (aq)
So the conc of Fe3+ ions is actually 0.2moldm-3
This will undergo hydrolysis with water, forming H+ ions as shown in the question.
So:
pH = -log(sqrt(Ka*[acid]))
Or whatever method you usually use, just make sure your conc of acid is 0.2
I think you misunderstood.
I meant that in the mark scheme they put the + sign on the carbon atom with one hydrogen atom. So the Br bonded to the carbon atom with two hydrogen atoms first.
My question is if i put the +sign on the carbon atom with two hydrogen atoms and bonded the Br to the carbon with one hydrogen atom first. Would that be wrong ?
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
Oh I see. Well I'm not sure but I think order of bonding (which carbon bromine bonds to first) should not matter.
If it does then someone else should correct me
so it does not matter which double bonded carbon atom is positive ?Oh I see. Well I'm not sure but I think order of bonding (which carbon bromine bonds to first) should not matter.
If it does then someone else should correct me
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
The carbon that is lacking a bond is positively charged.
- Messages
- 389
- Reaction score
- 628
- Points
- 103
Is it " 1,2 dimethylcyclopropane " ?
- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
- Messages
- 1,824
- Reaction score
- 5,326
- Points
- 523
I understand that A and C are not correct but I am confused between B and C.......... When it comes to cyclic isomers, won't propene and butene both have them?
Can anyone help me out?
Thnx
Last edited:
- Messages
- 340
- Reaction score
- 339
- Points
- 73
So I can understand that carvone is a ketone and 2-4 DNPH is a test for carbonyl group, but how will I know that what amount of molecules react with 2,4 DNPH??
- Messages
- 340
- Reaction score
- 339
- Points
- 73
I thought only the CH3 which is near to OH was the only chiral center, because it was the only one which was sp3 hybridizied and had four different groups attached but how is the answer D?? 
- Messages
- 1,394
- Reaction score
- 12,123
- Points
- 523
It can never be 6, because if you divide 6 Carbons into two molecules, each molecule will have 3 Carbons. You can't make any non-cyclic isomer out of propane. So 6 is not an option.View attachment 59772
I understand that A and C are not correct but I am confused between B and C.......... When it comes to cyclic isomers, won't propene and butene both have them?
Can anyone help me out?
Thnx