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5 hours such a waste of time lol. Just find summary's on this website resources page read through those --- find the best ones not the crappy ones--- then look at hsc.csu website. dont need 5 hours lol try 30 min or a couple of weeks before exams

whoaaaaa 15/15 (according to the answers posted on here) pretty happy with that since yesterday did a whole bunch on board of studies website and got 82%!! lol 1-A 2-B 3-A 4-C 5-C 6-D 7-D 8-D 9-D 10-B 11-A 12-A 13-C 14-B 15-B

So final answer is pH=1.54

Isnt it excess in 70ml?

It is the accepted standardised method though, measured using a turbidity tube (same method as above) Measured in NTU (nephelometric turbidity units) Edit: Azreil wat was the answer for the neutralisation reaction question. we seemed to be getting some conflicting answers lol

I got pH=1.54 (2.S.F)

can someone post a neutralisation reaction question?

Stratospheric ozone levels are measured from (in dobson units DU): Ground-Based instruments- UV spectrophotometers which are able to measure the intensity of the light at specific wavelengths. These instruments are pointed directly upwards and are set to measure light intensity at the...

Assessing dry cell in comparison with the button cell: Both have similar chemical reactions with Zinc being the anode Button cells produces a larger and more constant voltage to that of the dry cell. This is because silver has a large reduction potential. This allows the button cells to be...

How does an electronic oxygen sensor work? do we need to know? Edit: Also can anyone explain in detail the structure of a membrane filter

Esters occur commonly in nature. Usually a mixture of esters creates characteristic smells or tasts found in nature e.g smell of banana or pineapple. Domestic uses of esters include artificial flavourings for foods, scents for purfume and as nail polish remover Some esters e.g ethyl acetate...

Even though max temp is 100 degrees reflux apparatus still needed as Boiling Temps of the liquids used maybe lower than 100. Edit: How does the mixing of gases in the troposphere compare to that in the stratosphere?

HDPE= Ziegler-Natta process catalyst used-mixture of titanium (III) chloride and trialkylaluminium temperature of about 60 degrees Only few atmospheres of pressure=low pressure

Anyone got some decent M&M notes that they would be able to PM or email me? And i mean like short summary e.g 10 pages or less. I've got mine but pretty sure they are shoddy just need some to compare with. Any help would be great.

I dunno lol got in my notes that the ones i stated earlier were the preferred. If anyone's gonna ring the advice line chuck that Q in. Doubt you would lose marks for it anyway though.

Thought the IUPAC-preferred name for the alkanoic acids for 1-C and 2-C are not methanoic or ethanoic acids but rather formic acid and acetic acid repectively????

Reactants = ethanol and formic acid?? Product=ethyl methanoate? Thought the IUPAC-preferred name for the alkanoic acids for 1-C and 2-C are not methanoic or ethanoic acids but rather formic acid and acetic acid repectively????

Difference between quantitative and qualitative?

K thanks. really couldnt be bothered learning the chemical name. HSC 2010 :/ for real???