Chemistry P41 How was it?

[1357913579]

I found the paper a little tough. I hope the threshold is around 55
I got the Kc value as 25.
Was the percentage of Al 6% ?

yes 6 percent
and i also got 25

 

[Omar99]

I did addition for its structure, order was 1. But I think That I did some thing wrong in kc value because when they asked for conc. of fe^2+ so I took the conc value same for fe^3+ and multiplied it with .1 dmcube of its volume and then divide by 1 for its conc.
Same for I- but the ratio was different, but got the answer as 25. I don't know that's right or wrong

 

[mady666]

And what about the order of hcl

I got a zero order because half life was decreasing

 

[Omar99]

I got it 1st order as both half life's were almost the same

 

[1357913579]

no there were 2 things both were 1st order
one was of the of which the comount dont remmeber ts name it ws on the yaxs of the grph its was of the oder 1 becuase half life was constant.
and for order of hcl also 1 becuase comparing the initial rate of both the graph the one drawn before and the one after( the one which we had to drew)
right??

 

[Thampi4]

That's what I di

bro it is the same becuse yo dont see the overall equaton see the individual half equation hence 1:1[/quote

That's what I did and I got 25 yay

 

[Starry_night]

Yeah I got order 1 for HCl too! for question 1 part 4, where it asked if there were more products or reactants at equilibrium, was it more products? and why could the order of reaction of H2O not be measured in q.2?

 

[Thampi4]

I wrote its difficult to measure conc of water

What was ur rate constant

 

[Starry_night]

I got 0.1 as rate constant k

 

[Thampi4]

I think I messed if finding rate constant
I got 0.0162

 

[Thampi4]

I got the orders right tho

 

[Thampi4]

Who has physics tomorrow

 

[1357913579]

Who has physics tomorrow

me bro life cant gt any worse exams and exams

 

[1357913579]

Who has physics tomorrow

for the benzene to a ketone attached to a benzene what reagents did u menton?

 

[1357913579]

Who has physics tomorrow

founded the last question tough like wil lose 3-4 marks in that wbu?

 

[Thampi4]

me bro life cant gt any worse exams and exams

This week is the only hectic week for me cuz after phy I hav bio p4 on Friday

 

[Thampi4]

What ketone

 

[1357913579]

What ketone

wasnt their a reaction they mentoned first that what reagent u used then next prt they said by what reagaent can u reverse the rection

 

[Thampi4]

wasnt their a reaction they mentoned first that what reagent u used then next prt they said by what reagaent can u reverse the rection

That wasn't a ketone, it was an ester group

Use hcl(aq) and reflux it to reverse the reaction

To form C use a carboxylic acid with conc sulfuric acid and reflux

 

[Marks&Spencers]

What about the first question in that part, where it goes from phenol to a phenol attached to it a carbon and that carbon attached to it 3 more? What reagent would do that producing only HCl?