Chemistry: Post your doubts here!

[Dipim007]

Just Divide 150 By 114.3(Mr of Mg(hcoo)^2 ) to get answer....

 

[amina1300]

Just Divide 150 By 114.3(Mr of Mg(hcoo)^2 ) to get answer....

150? The question specifically says use your answers from part vi and that has and answer os 0.051

 

[Minsa Fatima]

150? The question specifically says use your answers from part vi and that has and answer os 0.051

2 mol Mg+2 reacts with 1 mol HCoo- so 0.051/2
initial conc 50 times the diluted so *50

 

[Krisarmy]

Hey some questions in p5 asked for half equations but we are not provided with data booklet...are we supposed to memorize them?

 

[Minsa Fatima]

Hey some questions in p5 asked for half equations but we are not provided with data booklet...are we supposed to memorize them?

we need to work them out using the info given

 

[furuta]

hii any predictions for chem p5 tmrw??? ):

 

[fardeen721000]

Any predictions BOIS ?

 

[anastasia grey113]

*sigh* how'd it go?

 

[amina1300]

*sigh* how'd it go?

went good but Im confused about the first calculations part in the first question. Did anyone get 20 moles?! the converted it into the conc.

 

[anastasia grey113]

went good but Im confused about the first calculations part in the first question. Did anyone get 20 moles?! the converted it into the conc.

no
it was 5 x 10^-6 for sulfate ions

 

[harisEjaz]

what else did u find hard?

 

[Zaki ali asghar]

what was the salt for last part of Q1?

 

[anastasia grey113]

what was the salt for last part of Q1?

I wrote AlCl3

 

[amina1300]

no
it was 5 x 10^-6 for sulfate ions

How did you get it?

 

[amina1300]

I wrote AlCl3

Sem

 

[amina1300]

How did you get it?

I forgot but wasn't it KMnO4?

 

[Zaki ali asghar]

how much is weightage for P5?

 

[chichibung]

is this paper 52 or 53?

 

[Zaki ali asghar]

52

 

[anastasia grey113]

how much is weightage for P5?

well 11.5%
which means out of 260, you'll have 30 for p5 and 100 for p4 and the rest of the 130 for AS