Search results

It is the equivalent to slapping the question and telling it to go home.

According to wikipedia: Barium sulfate is also used during the procedure of the soil pH test. In this test it is used so that it precipitates out any particles (usually clay particles) that would otherwise 'cloud' solution preventing one from seeing the colour of the pH indicator i.e. the...

Probs 1 or 2 if everything else was right, considering you only made one mistake i think its rediculous to penalise you.

Well, if you want to know where not to look for hard questions, try the 2011 hsc. That thing was easy.

For the arrhenius definition of acids and base I put that it was simpler than the bronsted-lowry and that it was still adequate in the majority of cases.

The -56kJ per mol thingo is based on the fact that for all neutralization reactions the net ionic equation is the same, if both the acid and based are strong. As for the exam in general, I thought it was a cake walk. The only really hard question was the one where you had to figure out the...

All of the chemistry is done from memory, its not like you can walk in there and teach yourself. Good luck.

Rather than knowledge based? Chemistry is mainly knowledge based, aside from the calculations but there are only so many questions which can be asked based on calculations.

Because you have to establish when microscopic membrane filters are useful eg when the flocculant doesn't work adequately, then you have to discuss how it is useful as a partial replacement of sanitisation. The price needs to be considered, along with the fact that certain chemicals can destroy...

Yeah, im kinda freaking out but i just went over last years hsc and it was a cake walk. Just gotta go over shipwrecks then i am sorted.

uv spectrophotometer can be pointed both upwards(on the ground) and downwards(on a satellite, in the air), in the form of a total ozone mapping spectrophotometer. Ozone density is measured in dobson units, a measure of density where 1DU corresponds to 0.01mm of ozone. A hard question is...