# Edexcel chemistry 1Watch

8 years ago
#501
A 10cm^3 of 0.10mol
B 20cm^3 of 0.05mol
C 20cm^3 of 0.05mol
D 13.#cm^3 of 0.#mol

whatcha get?
0
8 years ago
#502
(Original post by TheSingingMute)
A 10cm^3 of 0.10mol
B 20cm^3 of 0.05mol
C 20cm^3 of 0.05mol
D 13.#cm^3 of 0.#mol

whatcha get?
d i think
0
8 years ago
#503
It's D.....

Has no 1 uploaded the paper yet?
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8 years ago
#504
(Original post by Soppe)
It's D.....

Has no 1 uploaded the paper yet?
Lol you never stop and I don't think anyone has the paper, it was taken yday and today's a saturday..I put D but that was only because it looked odd..what's the reason?
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8 years ago
#505
(Original post by woozeybear)
Lol you never stop and I don't think anyone has the paper, it was taken yday and today's a saturday..I put D but that was only because it looked odd..what's the reason?
I think you have to work out the concentration and compare it. A to C have the same concentration while D has different con. And actually, you don't have to calculate as it's quite obvious D's concentration is the odd one out of the 4.
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8 years ago
#506
(Original post by woozeybear)
Lol you never stop and I don't think anyone has the paper, it was taken yday and today's a saturday..I put D but that was only because it looked odd..what's the reason?
mole time avangandro number i think
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8 years ago
#507
(Original post by ACatCalledMeow)
I think you have to work out the concentration and compare it. A to C have the same concentration while D has different con. And actually, you don't have to calculate as it's quite obvious D's concentration is the odd one out of the 4.
Oh ok I worked out the first 2 and they were the same so I guessed between c and d..mainly as I wasn't 100% sure that's how i was supposed to work it out but yay
0
8 years ago
#508
(Original post by Itachi8)
d i think
I actually put C. It said something about the number of ions and all of them actually had the same amount once you've calculated the moles apart from MgCl2. Remember, MgCl was also 20cm^3 and 0.1 moldm^-3 therefore C didn't actually have the same amount of ions compared to the rest.
0
8 years ago
#509
(Original post by Itachi8)
mole time avangandro number i think
Okay thank you
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8 years ago
#510
(Original post by Tzarchasm)
I actually put C. It said something about the number of ions and all of them actually had the same amount once you've calculated the moles apart from MgCl2. Remember, MgCl was also 20cm^3 and 0.1 moldm^-3 therefore C didn't actually have the same amount of ions compared to the rest.
Ooh yeah I read it was ions..but I'm sure they were both MgCl2?
0
8 years ago
#511
(Original post by woozeybear)
Ooh yeah I read it was ions..but I'm sure they were both MgCl2?
Nah.

A) NaCl - 10cm^3 of 0.10mol
B) MgCl - 20cm^3 of 0.05mol
C) MgCl2 - 20cm^3 of 0.05mol
D) NaCl2 - 13.33cm^3 of 0.05mol
0
8 years ago
#512
(Original post by amani-puresapphire)
I think you're right. I hate finishing early because i end up doubting everything i initially wrote and start changing things. I wrote 3 crossed it out, wrote 5, crossed it out again and settled on 5. Okay goodbye and good luck all, this thread is making me depressed
I put that it was 3 because of the br and br isotopes and then the br2 peak :/ lol
0
8 years ago
#513
(Original post by Tzarchasm)
Nah.

A) NaCl - 10cm^3 of 0.10mol
B) MgCl - 20cm^3 of 0.05mol
C) MgCl2 - 20cm^3 of 0.05mol
D) NaCl2 - 13.33cm^3 of 0.05mol
but it didnt say which ion to work out did they
0
8 years ago
#514
(Original post by Tzarchasm)
Nah.

A) NaCl - 10cm^3 of 0.10mol
B) MgCl - 20cm^3 of 0.05mol
C) MgCl2 - 20cm^3 of 0.05mol
D) NaCl2 - 13.33cm^3 of 0.05mol
Was MgCl2 for 13.33 Im sure..oh well and the Mgs were C and D
0
8 years ago
#515
(Original post by Itachi8)
but it didnt say which ion to work out did they
They asked us which compound didn't have the same amount of ions or something like that.
0
8 years ago
#516
Both C and D were MgCl2.
0
8 years ago
#517
(Original post by Patston)
Both C and D were MgCl2.
It doesn't matter. It was the calculation and no. of anions.
0
8 years ago
#518
So what did you actually put then?
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8 years ago
#519
(Original post by Patston)
So what did you actually put then?
C.
0
8 years ago
#520
(Original post by woozeybear)
Haha that question oh dear..I said the paraffin is flammable(?) and could catch fire so move the bunsen further away..worded better than that lol. And there were too many beady things which could shatter the test tube so put less in (I think I did this experiment once and we managed to shatter the tube by doing that :\) or
maybe it was putting the tube in the water and it got sucked up..dang lol oh well what did you put?
So sorry about late reply, got caught up revising m1. I said that if you heat it too hard the test tube will go BOOM (again, worded better) and not to do it with the tube thingy out of the water (I think that's how yours went BOOM!, idk, I just remember our chem teacher giving us a huge lecture on it.)

Stupid question, Like anyones going to remember doing an experiment.
0
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