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IIRC, ions (in particular cations) are electron carriers. So ions could move through an electrolyte, which could carry electrons around.

Re: �*文�*�詞! Tell me about it... I posted here while I was in year 12, and I'm in PhD now =/

Lead nitrate. Calcium Chloride (I believe) is soluable in water, and should not give a white ppt.

http://www.boardofstudies.nsw.edu.au/syllabus_hsc/pdf_doc/biology_stg6_syl.pdf Put "Koch" in search, give you pg48: - describe the contribution of Pasteur and Koch to our understanding of infectious diseases Edit: you are right. It appears in Searching for better health.

Just as an example, say you poured yourself a cup of water, from the tap say. If it has a blue colour, due to an excess of copper ion, you'll not be too pleased I'll assume?

I heard from a vet friend of mine that, if you are after money, don't do vet. Not worth it. You do it because you really really really really dig it.

To OP: If you still need an answer: water (including distilled) has a pH of s th like 4-5 due to the dissolved CO2. Adding NaOH in this circumstance brings it closer to 7 ( I would imagine)

Hmmm I'm kinda seeing what you are trying to do there. But I can't make up alot of the writings/printings on the attachment. Also I don't quite get a lot of short hand as well. Could you clarify those?

Love to add that teeth (and bones, incidentally) are made of strong bases. Which is why acidic stuff are capable of dissolving them. Soda water, being slightly acidic, can dissolve teeth. Brush yar teeth often:)

Hmm, I would like to argue that H2SO4 is a strong acid, stronger than HCl (Not that comparative strength of strong acids are needed for the HSC, but regardless) To quote both steps of ionisation of H2SO4 as the strength of the acidity of H2SO4 is not completely right IMO, since, by LB theory of...

Yes, acids ionises. Also, they ionises step-wise. First step of ionisation: H2SO4 + H2O ---> H3O+ + HSO4 - is an (almost) complete ionisation process. The second step is an incomplete one. Though for the purpose of the HSC, it can be assumed that H2SO4 will ionise two water molecules to H3O +...

Use less Na2CO3 to make a more dilute solution?

Re: above, hmmm sounds fair, though overly complicated for the purpose of titration.

Yea, coordinate covalent bond is really a formality. Once formed, CCB is identical to a normal covalent bond.

Re: �*文�*�詞! hey, long time no see, how's it been John? (did i remember it right?)

Re: above: For two reasons: a) the end point does not necessarily lie at pH 7 b) colour change of indicator is too slow to determine the end point. The bottom line is, you would never NEED to do a weak acid w/ a weak base. If you need to determine the concentration of a weak acid, use strong...

I tenatively quitted BoS before my exams. But 3 weeks before my exams actually finished, I addiction to BoS brought me back. Hence the quote.

CN has an extra electron than the "normal" electron count, which is also why CN is negatively charged.

QFT, honour or above to access it. You can also request document delivery through "Forms" ->"Request an article" if you are looking for a journal article.

Now here's something for you nerds to think about: E has the unit of J m has the unit of kg c has the unit of m/s so mc^2 has the unit of kg m^2 /s^2 which also has the unit of J?!?! Does this sound right?