If you have any question on chem p6 im ready you guys. Don't Worry!!

[mrnt3250]

I'm a bit confused...I mean in a question where they say "where does the equilibrium shift to" would I say it shifts to the left cuz it's favored, and so more is produced of the "favored" side? Or would I say it moves to the right?

Look, first you have to understand which side is the reactant and which side is the product.
For example:
2N + 3H2 --> 2NH3
<---

In this equation, the Right side is the product and left side is the reactants.
If we increase the pressure (We have to, for more yield), then the side with less molecules is right side (2 molecules) so it shifts to right side.
Then more product is produced.

 

[tribianni]

In which order should the water, hydrochloric acid and sodium thiosulphate solution be added to the beaker?

 

[suzy_96]

just did the exam

Hope you did well. The info you guys have posted hear all very hellpfull. thnx

 

[ThatReallyReallyWeirdDude]

I've read that question and it's sodium thiosulphate->water->acid or water->sodium thiosulphate -> acid. You can tell, because in the question they add the HCl TO the sodium thiosulphate solution.

I have my own question.
What on earth is the suck back effect and when does it arise?

 

[Lost_Life]

Hope you did well. The info you guys have posted hear all very hellpfull. thnx

yeah it was pretty easy,,, btw the EASIEST TEST OF IONS EVER!

 

[tribianni]

I've read that question and it's sodium thiosulphate->water->acid or water->sodium thiosulphate -> acid. You can tell, because in the question they add the HCl TO the sodium thiosulphate solution.

I have my own question.
What on earth is the suck back effect and when does it arise?

okkk thnx
i guess its like wen the test tube is place upside down.......nd we pik it up
m not sure actually me gt the same doubt tooo

 

[Ahmed Alaa El-shamy]

just did the exam

how was it ? any tips that may help ?

 

[tribianni]

yeah it was pretty easy,,, btw the EASIEST TEST OF IONS EVER!

wt variant?

 

[suzy_96]

I've read that question and it's sodium thiosulphate->water->acid or water->sodium thiosulphate -> acid. You can tell, because in the question they add the HCl TO the sodium thiosulphate solution.

I have my own question.
What on earth is the suck back effect and when does it arise?

It arises when the delivery tube isn't removed from the water before the heat is turned off. http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w05_qp_6.pdf queston 6 is about that

 

[Lost_Life]

wt variant?

2, its really good

 

[ThatReallyReallyWeirdDude]

It arises when the delivery tube isn't removed from the water before the heat is turned off. http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w05_qp_6.pdf queston 6 is about that

Thank you

 

[tribianni]

an

2, its really good

any gueses abt variant 1???

 

[Afraah]

isnt burette and pipette very accurate?

Nop burette holds on 50cm cubes whilst a measuring cylinder holds up to a 100cm cubes
Measuring cylinders are MORE accurate

 

[Ahmed Alaa El-shamy]

Nop burette holds on 50cm cubes whilst a measuring cylinder holds up to a 100cm cubes
Measuring cylinders are MORE accurate

no pipette and burette are more accurate than measuring cylinder

 

[mrnt3250]

Nop burette holds on 50cm cubes whilst a measuring cylinder holds up to a 100cm cubes
Measuring cylinders are MORE accurate

Nah, burette is more accurate than measuring cylinder!
Advantage: Measuring cylinder is easy to use and has a FAIRLY accurate results.
Disadvantage: It is not as accurate as burette.

 

[Afraah]

Nah, burette is more accurate than measuring cylinder!
Advantage: Measuring cylinder is easy to use and has a FAIRLY accurate results.
Disadvantage: It is not as accurate as burette.

Uhm well if that's what YOU think then okay...
but i knw that measuring cylinders are WAY more accurate
go to 2011 M/J frst question!!!! ull knw why!

 

[Ahmed Alaa El-shamy]

Uhm well if that's what YOU think then okay...
but i knw that measuring cylinders are WAY more accurate
go to 2011 M/J frst question!!!! ull knw why!

thats because u need more than 5ocm and burette is only 50

 

[Afraah]

thats because u need more than 5ocm and burette is only 50

Thats mt point !!!! Ehhh =S dude!!!!

 

[Ahmed Alaa El-shamy]

Thats mt point !!!! Ehhh =S dude!!!!

yeah but that doesn't make it more accurate !!

 

[George hallak]

guys i have a question. in anlysis, what is the difference of an Antiseptic smell and a vinegar smell? does it just mean that they are organic (ethanoic acid)