Shipwrecks (1 Viewer)

[Queenroot]

The equation for Tin in "shallow" water. Erm?
Also it was not supposed to be in net ionic form right?

 

[Web Addict]

I just wrote the oxidation and reduction half-equations and the overall equation.

 

[AfkForSoR]

Sn + H2O -> SnO + H2 ? :/ not sure was 2 marks

 

[Queenroot]

Sn + H2O -> SnO + H2 ? :/ not sure was 2 marks

shit I definitely didn't do that

I just wrote the oxidation and reduction half-equations and the overall equation.

I did that but then I wrote a normal balanced eqn


What were your guesses for the 4*C? solubility of oxygen

 

[khoavo12]

I got 9.2 for solubility

 

[Queenroot]

I got 9.2 for solubility

How'd you work it out?
Lol I just took an average and then I wasn't sure what to do, so I wrote 10 Lol. #strongunderstanding

 

[AfkForSoR]

as depth increases, temp decreases so solubility increases (dissolving of a gas is exothermic)
as depth increases, pressure increases so solubility decreases (pushed out Le Chatelier)
and expand on those 2 points and trends and stuff lol did u talk about all 4 scientists of just focused on one?

 

[AfkForSoR]

for solubility i think it was 10.4 i think you draw curve of best fit and estimate from there

 

[Queenroot]

as depth increases, temp decreases so solubility increases (dissolving of a gas is exothermic)
as depth increases, pressure increases so solubility decreases (pushed out Le Chatelier)
and expand on those 2 points and trends and stuff lol did u talk about all 4 scientists of just focused on one?

Did that, yet also mentioned that there isn't much oxygen...

 

[Web Addict]

shit I definitely didn't do that



I did that but then I wrote a normal balanced eqn


What were your guesses for the 4*C? solubility of oxygen

I got 10.5 mg/L.

as depth increases, temp decreases so solubility increases (dissolving of a gas is exothermic)
as depth increases, pressure increases so solubility decreases (pushed out Le Chatelier)
and expand on those 2 points and trends and stuff lol did u talk about all 4 scientists of just focused on one?

I think you're supposed to talk about all 4 scientists because the question is worth 7 marks.

 

[kimjuliana]

as depth increases, temp decreases so solubility increases (dissolving of a gas is exothermic)
as depth increases, pressure increases so solubility decreases (pushed out Le Chatelier)
and expand on those 2 points and trends and stuff lol did u talk about all 4 scientists of just focused on one?

wasn't the question about concentration of oxygen not solubility? Or did I do another epic silly and not read the question properly.... :'(

 

[AfkForSoR]

yeah sweet, looks like i did pretty well overall, was an easy test though; compared to trials.

 

[Queenroot]

I got 10.5 mg/L.


I think you're supposed to talk about all 4 scientists because the question is worth 7 marks.

m8 he's talking about the oxygen question not the 7 marker

 

[Frostbitten]

I think you're supposed to talk about all 4 scientists because the question is worth 7 marks.

Yeh, it was assess the 4 of them to see who made the biggest contribution so you would of had to have written shit about them all.

 

[Web Addict]

m8 he's talking about the oxygen question not the 7 marker

I was referring to his last question.

 

[Queenroot]

I was referring to his last question.

Oh okay, I didn't see.
I said for that question that it was a combination of all of them since without galvani's experiments volta wouldn't haven't been able to do this and so on... but I said Faraday's laws are applied today etc.

 

[Web Addict]

Who was happy when they saw that last 7 mark question? I was flicking through the exam when we were supposed to check that the questions and pages and I almost screamed out of happiness when I saw it. I was so relieved. For me, it's one of the easiest to write about becuase I didn't study much for the other parts.

 

[Queenroot]

Who was happy when they saw that last 7 mark question? I was flicking through the paper when we were supposed to check that the questions and pages and I almost screamed out of happiness when I saw it. I was so relieved. For me, it's one of the easiest to write about becuase I didn't study much for the other parts.

Me, but then felt sorta shit cause I studied for everything

 

[Web Addict]

Me, but then felt sorta shit cause I studied for everything

Lol. Shipwrecks is so boring, so I didn't bother with it much.

 

[darkness70]

For the graph, unsure if you're meant to do a curve of best fit. I did a STRAIGHT line of best fit cos we never do curves of best fit for chem (well at least not in my school) -> Estimated 9.4 mg/L

As for the 7 marker, I said Volta contributed the greatest so didn't really talk about Galvani. And said that he influenced Davy who used electrolysis which led to Faraday blah blah which is used for electrolysis today. Someone clarify with my answers?

Rest of paper was quite straightforward.. except for few parts here and there