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Re: Chem How HARD!! Bad, why would they give a mark for a wrong piece of information.

i CONCUR!

98/100 max, 90/100 min RAW. I think i'm gonna score well.

I finished 45 minutes early and only screwed up two one markers, aside from that i wrote correct responses to all questions, but i know that i will be marked in such a way that removes more marks, and hence i am not going to claim i am getting a state rank.

Yeah, your gonna be eating your hat when the marks come out.

Yeah, its a bit premature to think you got a state rank. I know I only lost two marks definitely but I may end up losing more.

Yes, that seems to be the right anwser.

The 3rd step was not in equilibrium. I also thought i went well in the exam, 19/20 or 20/20 in multiple choice and near full marks in the main and option. Easily over 85, probs low to high 90's. I finished with a full 45 minutes and that was taking the exam slowly.

It was showing that you understood le chataliers principle and the effect of temperature and pressure on the rate or reaction and yield of reaction. It was a good question because you had to apply knowledge as apposed to just regurgitating something that a teacher shoved into your cranium.

OMGOD, i thought those symbols where just arrows... dammit. worst mistake ever. i was reading left to right.

But silver is incredibly unreactive, more so than nickel. The less positive a metals reduction potential is the more reactive it is.

I am confident in my answers, there are no solutions as of yet though. 1/a 2/d 3/c 4/d 5/b 6/a 7/b 8/c 9/a 10/c 11/d 12/c 13/c 14/c 15/a 16/b 17/d 18/a 19/b 20/b

Nope, 9 isn't d it is a. It has nothing to do with the coordinate covalent bond. ozone is just like water except the hydrogens are replaced with oxygens, the molecule is bent but the electronegativity is the same so it isnt as polar as water but it is still polar.

question d was about the experiment of metals decaying

in clockwise starting from top left. 2 is identical to 4( or your picture is wrong), 1 is identical to 5, 2 is identical 6 probably wrong but still please have a look.

10 is a, 11 is c, 18 is definitely a

15 is a, the volume is determined by the number of moles, which is determined by the number of protons in the acid. Since they are the same the volume is also the same.

Nope, you can calculate pH using both systems. But it requires harder concentrations for bases that dont have OH and acids without H so for that purpose its really irrelevant.

1/a 2/d 3/c 4/d 5/b 6/a 7/b 8/c 9/a 10/c 11/d 12/c 13/c 14/c 15/a 16/b 17/d(i think from memory) 18/a 19/b 20/b 15 is a due to the fact that the volume of NaOH is determined by the number of moles of acid which it reacts with, the number of moles of acid is determined by how many protons it can...

Don't worry about it, it was only one mark.