Chemistry P31

[sazzabazza]

it may b da direction if current

It clearly stated that B to A was the electron flow!

 

[Abu mota]

Umm ok....why do u think so?
Back up yr answer plz I think its B....so pursuade me plzplzplz

I will and gladly first as electrode a was supplied with more oxygen it will have to oxidize first which
means it loses mass and the electrons travel through the external curitiba to b these electrons protect it from being oxidized

 

[EpicLol]

What about the question on the first page, How is acid rain formed?
What did u ppl put?

 

[Saadiya Ahmed]

Yea AgCl I put as a solid....it is a solid right?

How could i?!! I forgot to write the state symbols!! :'(

 

[raysonzaffar]

I put Fe2O3.2H2O coz its hydrated Fe2O3(H2O)2 is not an actual molecule....

with discussing every question i am losing marks !!!!!!!!!!!!!!!!!!

 

[somaya]

what was the ionic equation in #2 , was it Ag+ + Cl- ------>AgCl , or somthn else ? plz tell me the ionic eqn ! :$

yapz i rote da same

 

[EpicLol]

I will and gladly first as electrode a was supplied with more oxygen it will have to oxidize first which
means it loses mass and the electrons travel through the external curitiba to b these electrons protect it from being oxidized

but it showed that electrons flowed from b to a so b is the answer....

 

[raysonzaffar]

what was the ionic equation in #2 , was it Ag+ + Cl- ------>AgCl , or somthn else ? plz tell me the ionic eqn ! :$

2Ag+ +2Cl- -------> AgCl2................it wz for 2 marks u were not only supposed to write down the equation....also had to balance it !!!!!!!!!!!!

 

[EpicLol]

with discussing every question i am losing marks !!!!!!!!!!!!!!!!!!

dont worry be positive and do well in paper 1 to make up for like 60% of this paper

 

[somaya]

It clearly stated that B to A was the electron flow!

wt waz da markz of dis question

 

[raysonzaffar]

wt waz da markz of dis question

in past papers without balncing 1 mark.................this one wz for 2 !!!!!!!!!!!!!!!!!!!!

 

[somaya]

2Ag+ +2Cl- -------> AgCl2................it wz for 2 marks u were not only supposed to write down the equation....also had to balance it !!!!!!!!!!!!

y shud we balanc itz already balanced(agcl)

 

[EpicLol]

2Ag+ +2Cl- -------> AgCl2................it wz for 2 marks u were not only supposed to write down the equation....also had to balance it !!!!!!!!!!!!

I got AgCl as the charge on Ag was +1....Ag(I).....so the second mark was for the state like (l),(s),(g),(aq) etc....

 

[Roselian]

2Ag+ +2Cl- -------> AgCl2................it wz for 2 marks u were not only supposed to write down the equation....also had to balance it !!!!!!!!!!!!

Isn't silver just Ag+ not 2+?

 

[Abu mota]

but it showed that electrons flowed from b to a so b is the answer....

Bro it was 3 marks, do it can't be something that obvious

 

[raysonzaffar]

I will and gladly first as electrode a was supplied with more oxygen it will have to oxidize first which
means it loses mass and the electrons travel through the external curitiba to b these electrons protect it from being oxidized

love u man ...for a sec i had got scared !!!!!!!!!!!!!!!!!

 

[Roselian]

Hey on the volumes of the gases what did you guys get? I wrote 10 and 65, no idea if it's right.

 

[sazzabazza]

wt waz da markz of dis question

I think it was 2-3.

 

[EpicLol]

I thought I would get a B or an A in chemistry but I did so well in this paper (I think and I hope so) that now Im expecting an A*

 

[somaya]

in past papers without balncing 1 mark.................this one wz for 2 !!!!!!!!!!!!!!!!!!!!

2 markz and wt waz da total markz 4 last question