Chemistry Practical P34 Discussion 19 Oct

[RatJumper]

How did you guys find it

 

[eva 21]

it was....
....
:|
...
:|
...
lets not talk about how it was...

but i'l give u a hint...:



(i guess u got the picture...)
btw, what were your titer values?!

 

[RatJumper]

really? what did you find hard? my titre value was about 25.80.. wbu?

and a lot of people in my center were talking about getting answers which contained 10^-4 and stuff. I cant clearly recall if i got something like that or not, did you?
and also, what were your answers to the uncertainty error question table in q2?

 

[exgf]

my titre value was around 26.05..

the max error for 1 decimal place was o.05
2 decimal place was 0.005
3 decimal place was 0.0005

%error was max error/the grms * 100%

 

[RatJumper]

gr8 i got that!
and did any of ur answers in the exam have 10^-4 in them?

 

[eva 21]

really? what did you find hard? my titre value was about 25.80.. wbu?

and a lot of people in my center were talking about getting answers which contained 10^-4 and stuff. I cant clearly recall if i got something like that or not, did you?
and also, what were your answers to the uncertainty error question table in q2?

me neither... i cant recall any answer with that value. it might have been the nomber of moles or somthing... dunno...
(my titration was stupidly flunked...)

i was so STUPID in the titration...

i still cant bliv the mistake i did...
and I'm still recovering from the blow...
instead of the pipette, i used the damn MEASURING CYLINDER!!!
HOW STUPIIIIIIIDDDDDDD CAN ANY ONE GET!!!
I completely FORGOT about the pipette!!!
@#%$?**!
HOW CUD I HAVE DONE THAT :?: :?: :!: :!: :!:


any way... my titer value was 30.1
what will happen to my marks...?
how much marks will this affect...?
plz... someone tell me... (and put me outta my misery...)

 

[eva 21]

my titre value was around 26.05..

the max error for 1 decimal place was o.05
2 decimal place was 0.005
3 decimal place was 0.0005

%error was max error/the grms * 100%

(thank goodness...)
i wrote the same thing.

 

[eva 21]

and what were those 2 methods to show that it didn't decompose?
I'm confused about that one...

and which box did u tick in 4 determining the proportion? :?

 

[RatJumper]

and what were those 2 methods to show that it didn't decompose?
I'm confused about that one...

and which box did u tick in 4 determining the proportion? :?

For one of the decomposition questions, i wrote that if tested with limewater, it wouldn't turn cloudy because no CO2 would have been evolved.

And i ticked the top box. What about you.. and what was ur reasoning for it?

 

[RatJumper]

really? what did you find hard? my titre value was about 25.80.. wbu?

and a lot of people in my center were talking about getting answers which contained 10^-4 and stuff. I cant clearly recall if i got something like that or not, did you?
and also, what were your answers to the uncertainty error question table in q2?

me neither... i cant recall any answer with that value. it might have been the nomber of moles or somthing... dunno...
(my titration was stupidly flunked...)

i was so STUPID in the titration...

i still cant bliv the mistake i did...
and I'm still recovering from the blow...
instead of the pipette, i used the damn MEASURING CYLINDER!!!
HOW STUPIIIIIIIDDDDDDD CAN ANY ONE GET!!!
I completely FORGOT about the pipette!!!
@#%$?**!
HOW CUD I HAVE DONE THAT :?: :?: :!: :!: :!:


any way... my titer value was 30.1
what will happen to my marks...?
how much marks will this affect...?
plz... someone tell me... (and put me outta my misery...)

buddy dont worry about that hey. There is A LOT of error carried forward in chemistry pracs. You might have only lost about max 3-4 marks for what you did. as long as you know u did the calculations correctly for the following questions you should be good!

 

[eva 21]

God ratjumper...
u just allowed me to have a good nights sleep...
(atleast reguarding this matter...)
thanks.
iil b hoping that the calculations were correct then...

 

[eva 21]

i flunked at least one part in each part of the exam...


i ticked the second box...
the change in mass was sooooo little after i heated it...
so i thought that since little mass was lost, so little nahco3 had decomposed...
which meant the mixture had little amount of nahco3...

so i dint tick the first box...
(I'm so scared...)
:? :? :?

 

[eva 21]

btw, i also gave the same answer for the methods!
(ah... at least one matched...)
i gave the other method:
to heat the naco3 only (separately), b4 taking it's initial weight.
then to check the change in mass. the results should show that there was no change in mass and thus showing that it did not decompose.

(i hope that'l work...)

 

[eva 21]

what were the identifications of the salts???
i'm confuzed about the aluminium ion...
(was it fb5?)