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I reckon around 80 raw

I reckon, working out the copper sulfate question required a lot of thought just for three marks, thats a band 5-6er.

Overall, i reckon that test was a bit left field to all the other HSC chem exams

For the intial arguement wouldn't the use of the hydroxy ions, cause the corrosion to stop as they are used in the corrosion process?

But wouldn't that decrease the pH as the acid-base reactions are used up, and in the end it would neutralise again, before the Hydroxy group can react with the Fe2+ ion and hence corrosion rate will only increase in neutral and acidic environments

Why is the corrosion process accelerated in acidic environments? I thought it was because the production of OH- neutralises with the acid and by le Chateliers principle the production of OH- is increased.

Our teacher is sooo doughy, I don't reckon we have even got a single experiment right so far

yeh, It looks right

How do you carry out desk checking, I've tried to attempt it on the Heisennen books but it's fair confusing, can someone help me out?:argue: it's like it's gibberish or somethin'