Chemistry practical 34 oct/nov important

[soccerprinc3]

Anyone doing this paper?
best of luck ppl

 

[VicBoss]

S07 p31 colourless gas is released (effervescent observed ) by the addition of acid. So it can be CO2 or SO2 (its co2) ,how am i suppose to know which one it is without carrying out a test or using least time possible?

 

[soccerprinc3]

S07 p31 colourless gas is released (effervescent observed ) by the addition of acid. So it can be CO2 or SO2 (its co2) ,how am i suppose to know which one it is without carrying out a test or using least time possible?

Whenever you see effervescence or fizzing without the addition of heat then the gas produced is always CO2

 

[Z.S.M]

Whenever you see effervescence or fizzing without the addition of heat then the gas produced is always CO2

It could be any gas.... We had the same observation with oxygen.

 

[VicBoss]

How do you guys find this out? Don't they make and setup everything when theres no one around?

I just did the prac it was okay, long as usual so guys just work very fast... Could have gotten around 4 more marks if i never wasted time testing for gases that i was confused about.

Anyway good luck guys, don't forget to dua for me

Yaa, i lost 2 marks for same reason .

 

[Saloon]

Yaa, i lost 2 marks for same reason .

How many other marks did you leave out?... Taking it as though you also never finished

 

[shikha95]

Yaa, i lost 2 marks for same reason .

I tested all the gases! I was not planning to but the practical didn't feel complete without it...

 

[Saloon]

I tested all the gases! I was not planning to but the practical didn't feel complete without it...

How many marks did you leave out?

 

[shikha95]

How many marks did you leave out?

I didn't leave any, but as far as I know I messed up the whole anion test table...

 

[Saloon]

I didn't leave any, but as far as I know I messed up the whole anion test table...

Wow how fast do you work? Hope the grade boundaries are low

 

[rizwaan]

what was the % uncertainty?
what was the units in the table for rate?

 

[Saloon]

what was the % uncertainty?
what was the units in the table for rate?

I put the units for rate as s^-1 don't know if its right though...

 

[rizwaan]

I put the units for rate as s^-1 don't know if its right though...

yea the unit is correct i also did the same thing. what about % uncertainty?

 

[Saloon]

yea the unit is correct i also did the same thing. what about % uncertainty?

I really don't remember that question exactly lol... My brains fried, could you pls tell me the question and i'll tell you what i did

 

[shikha95]

yea the unit is correct i also did the same thing. what about % uncertainty?

It was (x/56.2)*100%
I put “x“ there cuz I don‘t remember the number..

 

[Saloon]

It was (x/56.2)*100%
I put “x“ there cuz I don‘t remember the number..

haha, i did that question but i don't remember the exact question... usually if they just ask for %uncertainty its just the [(error)/(the volume read)] x 100... if its max %uncertainty its [(2 x error)/(volume read)] x 100

 

[shikha95]

haha, i did that question but i don't remember the exact question... usually if they just ask for %uncertainty its just the [(error)/(the volume read)] x 100... if its max %uncertainty its [(2 x error)/(volume read)] x 100

Yeah, rizwaan that is right...

 

[Saloon]

Yeah, rizwaan that is right...

yay

 

[rizwaan]

i have done it wrong. i have done 2/2 that is 1 then divided 1 by 56.2 then multiplied by 100.

 

[shikha95]

i have done it wrong. i have done 2/2 that is 1 then divided 1 by 56.2 then multiplied by 100.

It's okay it's just one mark..