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Outline the Procedure of measuring the concentration of nitrates and phosphates in a water sample (3 marks) [Hint: Kjedahl test]

Indeed! Oooh I have another question, alongside that of QZP's.

Oh lord is this the thing about ground state electrons and cation atomic emission spectroscopy etc? Hahah someone please answer, I'm terrible at this.

Heheh apologies I only just saw this now :)) But yeah haha no worries about that, just wanted to make it stand out more :) At the moment would be a 3/4 Hmm yes I think if eutrophication was not mentioned, it would lose one mark (confirmed with my tutor previously) because BOD and...

anyone got questions to post?

Yeah that's pretty good :) 4/4 You can also add in stuff lyk why high BOD is bad. eg a high BOD is indicative of a low dissolved oxygen content in the water because it is quickly used up by bacteria/organisms which use respire/use oxygen. This can lead to a eutrophication (containing nitrates...

yeah defs. But QZP bro don't go too much out of the syllabus. Do you wanna try writing a model answer? Or anyone??

Yes as SSH corrected me previously, there is the requirement of maintaining the conditions for fermentation which require energy which is presently obtained from fossil fuels, furthermore for crop harvesting - the energy is also required. Since this is obtained from the burning of fossil fuels...

LOL ok someone have fun with this: QZP have a go or something if you want. Explain the procedure of measuring Biochemical Oxygen Demand in waterways and reasons for monitoring BOD (4 marks)

^ m9...

guys no it's actually a quantitative test, please see the above explanation. I can understand why it would be deemed as qualitative however realistically the only qualitative test is if the water looks brown or murky. But secchi disk is quantitative

Secchi disk looks like this http://friendsofgulfstvincent.org.au/wp-content/uploads/2012/10/Secchi-disk.jpg You pretty much lower the disk until the 4 quadrants are no longer visible/distinguishable and then you measure the length of the rope required to achieve this and hence turbidity is...

Ooh ok thanks!

Thanks. So that's enough ifo we need to know about him right? We can bs the rest?

But like how do we know we're meant to talk about bosh in the question? Wot even~

Omg who is this bosch?!

Ohhh ok ahahha i know right

Wait what is an analytical chemist? It sounds so boring whatever it is

hmm potentially 3-4/4 i think Wait someone confir

That's a really crappy question though :/ It's definitely an increase in pressure though because all of the concentrations are increasing at once. Would have been a better q with eqn