guys do you all remember the q about copper oxide and sulfuric acid reacting to make cuso4 and water? and they asked whether copper in copper oxide was getting reduced or oxidised or none.. what did y'all put?

Reply 49

loik24

8

Original post by chroma654

guys do you all remember the q about copper oxide and sulfuric acid reacting to make cuso4 and water? and they asked whether copper in copper oxide was getting reduced or oxidised or none.. what did y'all put?

copper is in group 2 so forms a cu2+ ion and sulfate ion is 2- so the sulfate must have given two electrons to the copper so i said it was reduced as it gained electrons

(edited 11 months ago)

Reply 50

Ewennnnn

3

Original post by loik24

copper is in group 2 so forms a cu2+ ion and sulfate ion is 2- so the sulfate must have given two electrons to the copper so i said it was reduced as it gained electrons

oxygen has a charge of 2- though

Reply 51

hasankhwaja

8

Original post by chroma654

guys do you all remember the q about copper oxide and sulfuric acid reacting to make cuso4 and water? and they asked whether copper in copper oxide was getting reduced or oxidised or none.. what did y'all put?

I said none as cu2+ retains its charge and doesn't change

Reply 52

scar-the-queen

16

Original post by hasankhwaja

I said none as cu2+ retains its charge and doesn't change

That's what I said too

Reply 53

Frizzle16523

11

Original post by hasankhwaja

I said none as cu2+ retains its charge and doesn't change

that is what I said because it just goes from copper oxide to copper sulphate so it doesn't change. I think it really depended on how people interpreted the question which was why it was a bit annoying.

(edited 11 months ago)

Reply 54

fivestarmichelin

12

Original post by chroma654

guys do you all remember the q about copper oxide and sulfuric acid reacting to make cuso4 and water? and they asked whether copper in copper oxide was getting reduced or oxidised or none.. what did y'all put?

copper wasn't getting anything done because it was still chemically bonded with a non metal (probably in a lattice), meaning it didn't gain or lose any electrons because it still had to be bonded (and therefore attracted) to a non metal

Reply 55

anonymous2682

11

heyy for the molar enthalpy change what did you guys get i got like -3664 something and for the excess zinc question i just did the mole ratio bc i ad no idea what to do?

Reply 56

pinkpony69

6

Original post by hasankhwaja

i got 7.01x10^20 for one

did u get that answer for the avagadros question

Reply 57

hasankhwaja

8

Original post by pinkpony69

did u get that answer for the avagadros question

yh for the no. atoms

Reply 58

Funnybunny72

6

So for the questions I remember there was a 6 marker on alloys and another 6 marker on sodium chloride and water and in this one u had to like say the structure and bonding for it and for the alloy one u had to say the differences and similarities between the alloys and pure metals which I found a bit weird and there was also the ways to seperate the substances in the first six marker