Chemistry: Post your doubts here!

[blymphocytes]

I

I did paper 21, was the paper easy or hard for you?

dk.....i didnt know some explanations, but it was ok compared to last year

 

[blymphocytes]

I

Its was 0.2 something

got 0.232 :-/

 

[blymphocytes]

h

That's fine, just do good in tomorrows paper 31

ey....do you know what might come btw?

 

[Maiday Holsey]

I used 70 grams per mole for the chlorine molecule. Is that acceptable?

P.S. The number of significant figures wasn't specified anywhere.

 

[Ayesha_m01]

Any one did p52 today?

yeah me.. how was it ?

 

[Hamnah Zahoor]

yeah me.. how was it ?

Good...How was yours?
But I think I messed up that table in Q2, still no worries it was of one mark only.

 

[helloolo]

I didnt know the nernst eqn part........that part just messed me up and the distialltion shit.......i didnt know wht to drw

sameeee i just drew some weird pipes

 

[Kanekii]

Good...How was yours?
But I think I messed up that table in Q2, still no worries it was of one mark only.

How did you do the last part of the last question?

 

[Hamnah Zahoor]

How did you do the last part of the last question?

the percentage purity one?
80.2%

 

[Hamnah Zahoor]

concentration of nitric acid*0.25 dm^3 = no.of moles
then i calculated the mass then the purity.

 

[A*****]

concentration of nitric acid*0.25 dm^3 = no.of moles
then i calculated the mass then the purity.

Concentration of acid wasn't given

 

[Hamnah Zahoor]

Concentration of acid wasn't given

it was to be taken from the graph

 

[Hamnah Zahoor]

Or again I am forgetting something....

 

[Hamnah Zahoor]

A***** Then how did you found the purity?

 

[Kanekii]

it was to be taken from the graph

Yes it had to be taken from the graph and it was conc of Cu2+ which was 0.19

 

[Hamnah Zahoor]

Yes it had to be taken from the graph and it was conc of Cu2+ which was 0.19

What was your answer?

 

[Kanekii]

What was your answer?

Mine was 60 something i think it was wrong.

 

[Hamnah Zahoor]

Mine was 60 something i think it was wrong.

What was your procedure?
And what was on the graph's other axis? I can't remember.

 

[blymphocytes]

Does anyone now have an idea about qp 31?

 

[blymphocytes]

sameeee i just drew some weird pipes

Me too.........what did you get as your percentage yield?