Chemistry P31

[msn201]

Saadiya ya 5alas u convinced me - am wrong- but its k its only worth 1 mark

 

[BurakBurak]

Its hydrated to its 100% Fe2O3.2H2O

Correct

 

[msn201]

guys first shouldn't be zinc because there was a decrease in the oxidation state of vanadium am sure

 

[raysonzaffar]

what was the formula for stoichiometry

Fe2O3(H2O)2

 

[NabzJ]

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

 

[Saadiya Ahmed]

?? Im afraid I dont understand u sry Im bad at english

I think your answer is right...the answer seems obvious now that you mentioned it!

 

[Saadiya Ahmed]

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

I wrote the same thing!xD

 

[EpicLol]

As usual you are wrong the correct answer is electrode A

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

 

[sazzabazza]

guys first shouldn't be zinc because there was a decrease in the oxidation state of vanadium am sure

If there's a decrease in the positive oxidation state of an ion that means it has gained electrons (reduction). Since Vanadium gains electrons it is the oxidising agent (oxidant) because it is taking electrons away

 

[EpicLol]

I wrote the same thing!xD

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

 

[msn201]

If there's a decrease in the positive oxidation state of an ion that means it has gained electrons.

OH MY GOD HOW SMART I AM

 

[Saadiya Ahmed]

would I get a mark for writing 1:1.5:1 ??

I dunno x/

 

[NabzJ]

Guys guys , its B , ive got evidence , on the diagram it shows that the electron flow is from electrod B to A , this means there is an electron flow to A preventing the iron from rusting even though there is oxygen blown through , so if the electrode B lost electrons this meas its the electrode B that decreases in size !

 

[EpicLol]

Fe2O3(H2O)2

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

 

[somaya]

don't we round the 1.5 to 2?

hw can it b it shud b 1:1:1as (22.22/16 cumz 1.38 )so we shud consider it 1

 

[somaya]

Guys guys , its B , ive got evidence , on the diagram it shows that the electron flow is from electrod B to A , this means there is an electron flow to A preventing the iron from rusting even though there is oxygen blown through , so if the electrode B lost electrons this meas its the electrode B that decreases in size !

it may b da direction if current

 

[reya]

As usual you are wrong the correct answer is electrode A

me 2!

 

[EpicLol]

hw can it b it shud b 1:1:1as (22.22/16 cumz 1.38 )so we shud consider it 1

No it would be considered 1:1.5:1 which would be 2:3:2

 

[rjcooo1]

wat was the volume question???

 

[Saadiya Ahmed]

it may b da direction if current

No it was mentioned as 'electron flow' and it couldnt have been conventional cause it wasnt an actual circuit!