EDEXCEL Chemistry Unit 1

lucaz

that why i am asking all you knowlagable people what your predictions will be for the boundaries

Your asking the knowledgable people. No doubt they found it pretty easy, but how about the unknowledgable people, they would bring the boundaries down. SO unless theres a pool of knowledgable and unknowledgable people, its hard to predict. So perhaps you want to ask the unknowledgable people aswell as the knowledgable people on this forum how well they did, we can work out the rough grade boundaries. :smile:

Reply 62

john !!

14

oxidation state of oxygen in potassium superoxide? +2 ?

is it not +1

-1/2 i thought oh well.

-0.5

fazi

-1/2 i thought oh well.

it is -0.5

Reply 67

fazi

-1/2 i thought oh well.

dammit- it is -1/2, i completely forgot about 02, so i wrote -1. Argh!

Reply 68

fazi

lol i should really get off this forum and do my s1 revision.

Reply 69

BCHL85

12

-1/2 is right answer :smile:

Reply 70

lucaz

that why i am asking all you knowlagable people what your predictions will be for the boundaries

the knowlagable people here arent the examiners.

Reply 71

Mathemagician

the knowlagable people here arent the examiners.

innit

Reply 72

lucaz

1

sorry, i mean -1. If k is plus 1 then surely 02 is -1

Reply 73

lucaz

sorry, i mean -1. If k is plus 1 then surely 02 is -1

yeah, O2 = -1
so an OXYGEN atom = -0.5

Reply 74

Heidi

BCHL85

-1/2 is right answer :smile:

i thought oxidation numbers where all whole numbers and that's why i changed my answer to i think -1/
That sucks!
Oh well, this question was only one mark right?

Reply 75

that is mathematically incorrect.

edit: gordon -->you deleted your message :p:

Reply 76

Heidi

I also thought this exam was very easy but everyone else ive spoken to said they thought it was easy as well. So that is bad news for us. So just because u think u might have done well; u might not get the grade u want :frown:

Reply 77

Heidi

I also thought this exam was very easy but everyone else ive spoken to said they thought it was easy as well. So that is bad news for us. So just because u think u might have done well; u might not get the grade u want :frown:

yeah true. But alot of people would have lost ALOT of marks on the explanation questions. The mark schemes are specific.

Reply 78