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Hmmm tricky, because the moles of OH produced by NaOH will be the limiting reagent. lol im dumb well, n(1H+) of sulfuric = 2x10^-4 mol and then n(OH-) = 1.56 x 10^-3 mol hence, excess OH- = 1.36 x 10^-3 mol does pH = 11.1 ?? im probably wrong. Edit: Some advice - the...

+1 although i've thread its only up to ppb for some cations. but i guess the latest technology would be as sensitive as ppb for all cations. AAS only tests for presence of cations, right?

obviously not.. they extract it from plant material and then clean it and stuff. but i honestly recommend u not talk about cellulose as a recently developed biopolymer, it won't get u the marks.

n(Citric)= 0.01 * 0.01 n(H+) = 3 x 10-4 mol (since its triprotic) n(NaOH)= 0.012 * 0.03 n(NaOH)=n(OH-)=3.6x10-4 mol there is 6 x 10-5 mol of excess OH [H+] = 10-14 / [OH-] Ultimately, pH = 9.78 (2 sig fig)

yeh, i would have to have a final sentence that assesses overall impact of polymerisation, plus whether its positive or negative. good point :)

yeah, good point.

In brief: Polymerisation processes such as Addition Polymerisation (Ziegler-natta process) have resulted in the commercial production of plastics such as low and high density polyethylene (HDPE and LDPE). These plastics were used in the manfuacture of bottles (such as drink and shampoo...

LOL u don't manufacture cellulose, its naturally occuring. they mean, biopolymers that are manufactured. its a syllabus dot point. There are heaps of other biopolymers, Cyclodextrin and Biopol are just some suggestions. If they give u a question like the one u gave me in an exam or HSC...

who can be f'ed writing another long response. lol

we modelled the step where ammoniacal brine is carbonated, producing NaHCO3. As a source of CO2, we just had a conical flask with marble chips, added HCl, which then released CO2(g). This was attached to a delivery tube, which bubbled CO2(g) into the ammoniacal brine. This modelled that...

Straight-chained alkanoic acids and alkanols have higher boiling and melting points than alkanes, since they have polar functional groups (such as -OH and C=O and COOH). As a result, these polar functional groups, molecules of alkanoic acids and alkanols are joined by intermolecular forces such...

lol no prob. but did u understand it.. did it answer ur question?

A buffer system resists drastic changes to pH, when a small amount of acid or base are added. It consists of equal amounts of an acid (or base), and its conjugate base (or conjugate acid). Since both conjugates are present, by adding H+ and OH-, both can be 'buffered' by the system. A natural...

I would google some recently developed bipolymers. Some you could look at are Cyclodextrin and Biopol(Polyhydroxybutyrate-Hydroxyvalerate) . It asks you to evaluate, so you have to make a qualitative judgement based on the criteria that you provide about the use of a biopolymer (and how the...

hmm, there shouldn't be a 2 in front of all the species. its a 1:1:1:1 stoichiometric ratio.

Well, think about it physically. In equilibrium, there are ALWAYS some amounts of both products and reactants present. Obviously, the amount of each changes. Inside a soft drink bottle there is still some gaseous CO2 in the air just above the liquid. So, when you open, the pressure is GREATLY...

yep, thats true. Correct ;) Next: Compare the chemical and physical properties of Ozone and Oxygen.

from knowledge, the oxidant is MnO2, not MnO. So then, you use: Oxidation: MnO2(s) + NH4+(aq) + H2O(l) + e- ---> Mn(OH)3(s) + NH3(aq)

Instead of adding exactly 25mL of BaCl2 solution, add EXCESS BaCl2(aq) until no more precipitate is formed. You need to stir the solution well to ensure thorough mixing, and solvation of the (NH4)2SO4. Although, more importantly, you should mix the fertiliser mixture, to ensure that a...

I pretty much did, above. The pressure decreasing leads to a DECREASE in concentration of any gaseous CO2 in the system. As a result, the equilibrium will shift such that more CO2 (g) is produced to partially offset the decreased [CO2(g)]. Hence, the equation i gave above is favoured.