yes, but it still establishes an equilibrium reaction that does not FULLY ionise, so it's not exactly 1, and it's an acid so it's more then 7queenie said:dude, ur h2so4 is stuffed, its a strong acid
yes, but it still establishes an equilibrium reaction that does not FULLY ionise, so it's not exactly 1, and it's an acid so it's more then 7queenie said:dude, ur h2so4 is stuffed, its a strong acid
Rench u dont need phys for q 5, think about it, can u acutally see electrons move??~ ReNcH ~ said:Q1 I said B, but I also considered D to be correct...who knows?
Q5 I got wrong...I said D, and having not done physics was later told that electrons don't flow through a voltmeter so meh.
Q14 I said D
Q15 I said A - I'm fairly sure of this one.
So depending on Q1, I'm hoping for 13-14/15:
B
C
B
D
D (wrong)
A
C
A
D
C
A
B
C
D
A
thats industrial stuff, is it not?SmileyCam said:yes, but it still establishes an equilibrium reaction that does not FULLY ionise, so it's not exactly 1, and it's an acid so it's more then 7
um.. h2so4 is diprotic...SmileyCam said:yes, but it still establishes an equilibrium reaction that does not FULLY ionise, so it's not exactly 1, and it's an acid so it's more then 7
yea it is, but what industrial kids are taught:xrtzx said:um.. h2so4 is diprotic...
Yea, I know. I realised that afterwards tooxrtzx said:Rench u dont need phys for q 5, think about it, can u acutally see electrons move??
According to a Google search, acetic acid/acetate can be used as a buffer, so I think the answer is D.queenie said:yea it is, but what industrial kids are taught:
h2so4 --> H+ + Hso4-
then
Hso4 = (eqm) H+ + so42-
but... the point is, that thats taught in the elective.
generally, h2so4 is diprotic, so the answer would have been a.
Yayyy I put that as a guess~ ReNcH ~ said:According to a Google search, acetic acid/acetate can be used as a buffer, so I think the answer is D.
exacty! but as ppl have suggested, it wasnt in terms of the ratio, merely the fact that radiocative is for atomic number > 83~ ReNcH ~ said:I'm still just unsure about Q1.
If B) were "Too many protons or neutrons in the atom", then it would definitiely be B but the "and" changes things a lot.
lol, i had d too, i was thinking about it, then i realised, how da hell are u ment to see electrons move, luckily i changed it . And yeah 9 is D, as one person posted, a buffer is a weak acid + conjugate base. argh i misread the question again, i related the q to an amphiprotic substances, argh...~ ReNcH ~ said:Yea, I know. I realised that afterwards too
But I considered that maybe a reading on the voltmeter would indicate a movement of electrons...ah well, I regret not putting B coz I was making a 50/50 toss-up but it's too late now I guess.
that's the answer (weak acid/salt of that acid)~ ReNcH ~ said:According to a Google search, acetic acid/acetate can be used as a buffer, so I think the answer is D.
a buffer consists of comparable amounts of a weak acid with its conjugate base (one less proton than the acid)~ ReNcH ~ said:According to a Google search, acetic acid/acetate can be used as a buffer, so I think the answer is D.
Q15: I'm fairly sure it's A.laserbrainz said:that's the answer (weak acid/salt of that acid)
as for 15, thiosulphate/o2 ratio is 4: 1, but if you go through the equations, that halves again, = 0.30
i got 0.052% for the calc % whatever it was with the TDS one as well (yay, i can do some chem) - not my strongest subject.
As for me, q4 took ages - came back, & it was ok the second time - got d as well.