Hsc :|

[Dr.Merp]

i did question 25 and question 28
q25 was envrionment
and 28 was protection policy!
dude ur comment made have a super quick panic attack and i just ran down stairs to double chek i didnt do the questions from the same section!! dont scare me like that..

My bad sorry

i did protection and inequality

 

[incomparable]

ONE MORE EXAM LEFTTTTT. i forsee a very late night of physics tonight... D: cramcramcram

 

[magicfreak]

Chemistry was tricky. Zzzz I picked up all my stuff off my desk, including my identification photo. Those are meant to be left in the room. I don't know what I should do...

 

[Dr.Merp]

English ~~~~~~~~~~~~~~ DONE
Ext1 maths ~~~~~~~~~~~ DONE
Ext2 maths ~~~~~~~~~~~ DONE
Economics ~~~~~~~~~~~ DONE
Chemistry ~~~~~~~~~~~~ DONE
Physics ~~~~~~~~~~~~~

 

[magicfreak]

Yea just one more! Luckily I can just bring it back tomorrow morning for physics.

 

[adomad]

Chemistry was tricky. Zzzz I picked up all my stuff off my desk, including my identification photo. Those are meant to be left in the room. I don't know what I should do...

I hope you left your answers on the table... :s identification photo? well bring it tomorrow for physics/ur next exam.

 

[Luxxey]

Yeah chem was harder than in previous years. That titration question was huge. Calculation and method. :/

 

[adomad]

lol yeh. i saw 8 marks on titration ..T.T wasn't hard, just tedious

 

[adomad]

Do you think we had to suggest an indicator?

 

[Luxxey]

I did, because we know the acid and base being titrated. Though if you just said "add indicator, add acid until permanent colour change, etc." I think that's fine, seeing as it's an 8 marker.

In the MC I blanked on whether methyl orange went from red-yellow or yellow-red.. thank God I picked the right one haha.

 

[rulerofhell]

Do you think we had to suggest an indicator?

Definitely...

I can't believe I screwed up industrial chem... complete mental blank at the sodium chloride electrolysis question, be lucky to get anything more than 2/5
And had no idea about that hydrogenated ethylene Q. But other than that I reckon I did okay... aim raw mark: 85+/100 hopefully scales to mid 90s lol

 

[incomparable]

Definitely...

I can't believe I screwed up industrial chem... complete mental blank at the sodium chloride electrolysis question, be lucky to get anything more than 2/5
And had no idea about that hydronated ethylene Q. But other than that I reckon I did okay... aim raw mark: 85+/100 hopefully scales to mid 90s lol

for the hydronation of ethylene.
i think its an addition reaction.
and to test, we test for decolourisation of bromine water

ugh. for the reagant A: i put sodium hydroxide. I dont know why ): i saw the potassium on the soap and wrote sodium lol.

 

[yanyan]

ahhaha yeah i forgot the colour range for methyl orange but scraped it in there...i found MC quite tricky (compared to most years) but industrial was more or less a gift.

 

[rulerofhell]

I managed to make up some equations which were half right for that question and remembered the anode equation for chlorine which hopefully scrapes me 2/5

And yeah that q seems so obv now!! I put in the addition reaction for second part of that q but stupidly somehow said C2H4 + H2 ---> C2H6 which was a thermal cracking reaction in my head...

 

[Luxxey]

Um.. for the question on the monitoring of DO and BOD levels.. when it said "natural ways" did it mean natural waterways or natural methods? :/

My friend said she took it as natural methods of analysis, but that didn't work out seeing as most of her tests was chemical.

 

[magicfreak]

Pretty sure if they wanted tests, they wouldn't say "natural ways". That's too ambiguous.

 

[adomad]

I did, because we know the acid and base being titrated. Though if you just said "add indicator, add acid until permanent colour change, etc." I think that's fine, seeing as it's an 8 marker.

In the MC I blanked on whether methyl orange went from red-yellow or yellow-red.. thank God I picked the right one haha.

Yay. haha yeah. i sorta forgot that one as well.

 

[adomad]

Um.. for the question on the monitoring of DO and BOD levels.. when it said "natural ways" did it mean natural waterways or natural methods? :/

My friend said she took it as natural methods of analysis, but that didn't work out seeing as most of her tests was chemical.

What's a natural method? throwing leaves into the water and testing for BOD? I think it's talking about water in a natural environment such as a river/lake

 

[yanyan]

wait did it ask for testing bod and do? i thought it just asked why it needs to be monitored in natural ways

 

[Luxxey]

Yeah "natural ways" doesn't make sense when you think about it in terms of tests. Must have been a misprint of "natural waterways", but I think most people should have worked it out.

So don't worry yanyan, didn't need tests haha.