how was it (3 Viewers)

[electrolysis]

Guessed 3 MC questions, but the rest of test was pretty good, especially the industrial chem option <3

 

[Gibbatron]

Overall thought it was a pretty good and easy test. Used a whole booklet for the option. I was lucky - it didn't have any of the stuff im not good at in it (nuclear, batteries, cfc's). Its the first test ive finished comfortably, so i was happy with it. Except for a couple of the mc questions >.<

 

[NoName91]

argh! what is this battery question a few people have mentioned????? i swear i dont remember there being one...

I think they're referring to the galvanic cell question - which is a battery lol. I'm glad there wasn't a comparison of lead or dry cell with another battery thing .. but I guess its not too bad

 

[trrc027]

I think they're referring to the galvanic cell question - which is a battery lol. I'm glad there wasn't a comparison of lead or dry cell with another battery thing .. but I guess its not too bad

o good, that makes me feel much better, i nearly had a heart attack! missing a whole question wouldve ruined my mark, hoping for band 6, loved that exam! calculations=amazing! shipwrecks topic was crap tho

 

[NoName91]

o good, that makes me feel much better, i nearly had a heart attack! missing a whole question wouldve ruined my mark, hoping for band 6, loved that exam! calculations=amazing! shipwrecks topic was crap tho

Shipwrecks was ok I think... what did the first question mean? With the cans? Really strange, hasn't been a question like that before. I'm glad the 7 marker was on the history of cells etc.

 

[mitchwong650]

Shipwrecks was ok I think... what did the first question mean? With the cans? Really strange, hasn't been a question like that before. I'm glad the 7 marker was on the history of cells etc.

personally i loved shipwrecks.

Q 1 a) was just aluminium (as it forms a passivating layer)
b) was really weird and i just fudged some answer about protective paints and stuff...

the rest was great.

 

[Drewx]

The emulsions question in Industrial Chemistry was so left field did not see it coming.

 

[Gibbatron]

The emulsions question in Industrial Chemistry was so left field did not see it coming.

Lol i reckon. So was the question that asked for THE major use of sulfuric acid. I said fertilisers, but i was surprised by it. Normally it just asks for ONE major use.

 

[123huss123]

Guessed 3 MC questions, but the rest of test was pretty good, especially the industrial chem option <3

man wat did u get for ur value of K in industrial chemmmm your the only one i seee hoo done itt everyone done shipwrecksss

 

[Gibbatron]

man wat did u get for ur value of K in industrial chemmmm your the only one i seee hoo done itt everyone done shipwrecksss

I got 5 something for the K value

 

[sordatsoy]

For industrial...what was the main use of sulfuric acid???....i did dehydrating agent....but not sure.

 

[Gibbatron]

Its fertilisers im pretty sure.

 

[123huss123]

i sedd dehydrating and pikling agent lma0
mmm think i got my K rong thennnn
got like 0.913 or somting like that
oh well

 

[mR sinister]

i got the ethanol mass correct, and also the emf.
but for nitrogen content in the bread ....
I got 0.8%
anyone else get this?

 

[123huss123]

m i gott 1.7% forr the breadd question
0.9 for emf andd 3.8ish for ethanollll oneee

 

[boo92]

i liked it. i did biochem option. 7 marks on a pe question. great for me coz i do pe. the paper was heaps better than i thought. my teacher thought we wouldnt like it but i think all the class liked it. there's only 10 of us lol. last exam. glad its over now!!

 

[TechnIx]

Main uses of Sulfuric Acid include:
Electrolyte in Car Batteries (Think about all the cars out there..)
Steel Manufacture (Pickling)
Fertilisers

From Wikipedia:
"Principal uses include lead-acid batteries for cars and other vehicles, ore processing, fertilizer manufacturing, oil refining, wastewater processing, and chemical synthesis."

 

[electrolysis]

The main use for sulfuric acid is in the manufacture of superphosphate (a type of fertiliser) - it accounts for 72% of sulfuric acid's industrial use
equation: Ca3(PO4)2 + 2H2SO4 + 4H2O ---> Ca(H2PO4)2 + 2CaSO4.2H2O
I dont think you need the equation, but I put it in just for the fun of it

 

[GUSSSSSSSSSSSSS]

BAH chem was good....LAST EXAM WOO!!! xD xD

celebrated it with 4hrs at the net cafe =P

 

[electrolysis]

man wat did u get for ur value of k in industrial chemmmm your the only one i seee hoo done itt everyone done shipwrecksss

[0.45]^3 [0.15]
-------------------- = 5.4675
___[0.05]^2