Thoughts? (1 Viewer)

[erm]

For people doing industrial, did you determine that the system was NOT at equilibrium?

yes did you?

 

[benji6667]

For people doing industrial, did you determine that the system was NOT at equilibrium?

no it wasn't... i think Q was less than K

 

[Aaron.Judd]

The cathode was the chlorine gas turning into chlorine anions.

That's what I said. Everyone kept telling me the potassium got reduced somehow.

 

[independantz]

For people doing industrial, did you determine that the system was NOT at equilibrium?

Yep.

 

[r0kstar]

For AAS, you were supposed to work it out from the graph, right?

i did that too and got 1.6mg zinc.... does any1 no how to get the answer?

 

[danz90]

Yep

*sigh of relief*

Which parts did people find the hardest?

 

[JamesTockuss]

Awesome, got this too

And the equation was :

Ni(s) + 2Cl^-(aq) ----> Ni²⁺(aq) + Cl₂(g)

?

I think its the other way around:
Ni(2) + Cl2(g) --> Ni2+ + 2CL-

Because Chlorine is getting reduced?

 

[old.skool.kid]

Awesome, got this too

And the equation was :

Ni(s) + 2Cl^-(aq) ----> Ni²⁺(aq) + Cl₂(g)

?

Sweet i got that. And yeah i said it wasnt, because k was out be a d.p or something is that what you got?

 

[Yamiyo]

yeh i got the exact same results. What a relief.
What did everyone get for the 4th mc question? Was it water or nitrogen that is most abundant in the atmosphere at the ground state?

Nitrogen

Wasn't thinking properly for the galvanic cell eqn... sorry =)

 

[Aaron.Judd]

they overdid the calculations this year.
which blows.

meh, its over.

I agree, there was too many calculations compared to past years.

 

[independantz]

i did that too and got 1.6mg zinc.... does any1 no how to get the answer?

No you have to calculate it. although i think i got 1.7mg but i did some sort of calculation cant remember what it was now.

 

[danz90]

i did that too and got 1.6mg zinc.... does any1 no how to get the answer?

because the concentration was 1.6mg/L

And the sample was 100mL, you had to multiply 1.6 by 0.100L to get 0.16mg

 

[Aaron.Judd]

All very good except for that Ethanol being carbon neutral question - although talked to my teacher afterwards and amongt the waffle I answered it!

But yeh heaaaaps of calculations!

I rather liked that question.

 

[JamesTockuss]

That's what I said. Everyone kept telling me the potassium got reduced somehow.

I dont think so - I think the KCl was just the electrolyte? Because Cl2 gas was bubbling it - they wouldnt have it doing that for nothing -_-

 

[Shadose]

Yep.

My contribution for: YAY!

 

[Aaron.Judd]

It was an alright paper. Not too easy, but not as hard as some of the past papers I've done.

Did anyone else get hydrogen gas for question 20?

Yes, I got Hydogen. That was one of the easiest calculation questions in the paper.

 

[yorkstanham]

because the concentration was 1.6mg/L

And the sample was 100mL, you had to multiply 1.6 by 0.100L to get 0.16mg

I second that. Although i got 0.165mg/tablet, Graph must of been slightly different.

 

[r0kstar]

Uh no.
Ni(s) + Cl₂(g) ----> Ni²⁺(aq) + 2Cl^-(aq)


The previous one has two oxidations, which is impossible

hey dude i got that too.... u sure its rite?

 

[Aaron.Judd]

Friggin awesome exam. The calculations were a bit iffy, and the Industrial Chemistry option was a bit of a bitch. But overall, pretty good. Sayoonara Board of Studies!

I didn't really mind the industrial chem option. Other options were certainly harder. I screwed the equilibrium constant one in industrial chem so had to go back and fix it up after I realized what a stupid mistake I made in forgettign to find the cocnentration from the given table!!!

 

[fishbulb]

hey dude i got that too.... u sure its rite?

yep positive, i do shipwrecks