Recent content by dan.121212

uh C6H1206 is glucose, i think ya mean C25H5OH(aq) ----> C2H5OH(l)

in a nutshell - you're right!

Question 21 of the 2007 CSSA trial: "with the aid of appropriate equations, explain why the dihydrogen phosphate ion (H2PO4-) is amphiprotic yet an aquesous solution of KH2PO4 has a pH greater than 7" (5 marks) What the suggested answers say is basically to get those 5 marks, u need : -an...

DONT PANIC - ull be fine

i believe first part is correct, but second part - times by five, not four (i believe) also, there is no such thing as "0.10 Mol -1" or "0.100 mol -1", - there IS such a thing as: 0.10 mol, 0.100 mol, 0.100 mol. L^-1, 0.10 mol.L^-1 the first two are number of moles, the latter two are...

i answered yes, cause i didnt wanna confuse people - some people (who don't do 4U maths like us, jks) might not grasp the concept, and if i said 'no' theyd be like 'so wat do i punch into the calculator?' - in terms of punching into calculator, they are the same, its just the S.F. u put ur...

short answer: no -------DO NOT READ ON IF YOU STRUGGLE WITH THE IDEA OF SIGNIFICANT FIGURES------- ...however 0.10 mol is to two significant figures WHILE 0.100 mol is to three significant figures it's all bout accuracy - if a question gives u all info to 3 significant figures...

the whole point of the titration is to find the concentration of acetic acid in vinegar, is it not? there fore u titrate diluted solution roughly, then 3 times within 0.1mL, then work out concentration of acetic acid in that diluted mixture, then use that to work out the concentration of...

bromothymol blue would work as an indicator, wouldn't it?

if uve got a task on this titration, by googling titration and potassium hydrogen phthalate there are websites that might help you. This seems really helpful: http://www2.truman.edu/~blamp/chem222/manual/pdf/khp.pdf

cheers Sastrawan - u really helped me out good luk!!

1) do u mean states as in (g) (l) (aq) (s)? caus eif u do, make sure every chemical equation u write has states for all elements/compounds, i know some textbooks dont have them, but search the internet, look in another textbook do wateva u have to to find teh states - cause they in the HSC ur...

n = m/M = v/V = c.V where : n= number of moles (mol.) m= mass (g) M= molar mass (g.mol^(-1)) v= volume (L) V= molar Volume (L.mol^(-1)) c= concentration (mol.L^(-1)) (to ppl not familiar with this notation x^(-1) = (1/x), thus 'grams per mole' can be written as g/mol or, more...

it was my understanding that electrons flow from (-) to (+), that is from the anode to teh cathode, while CONVENTIONAL CURRENT (not one u need to know in chem, but the physicist in me puts it in) flows in the opposite direction - from cathode to anode

yeh, u need to scroll down the register page