Salt/Qualitative Analysis for P3 Chemistry

[Saad the Paki]

Which variant?
Btw am the same person as cute97

Why is your profile private now?

So what else do you know about v32

 

[Akshajistari]

How do you guys manage your time during the practical? For some reason, I can't help but panic sometimes.

 

[HELLNO]

How do you guys manage your time during the practical? For some reason, I can't help but panic sometimes.

My only advice which works really well with me is to read the whole question before starting and when it comes to titration, do it only once but do t accurately from the beginning and then manipulate the other results to make a table, making many titrations is a wastage of time! And since there is no enthalpy so we are lucky for that!
Qualitative analysis will be easy too ^.^
Good luck

 

[Farhan Ismail]

My only advice which works really well with me is to read the whole question before starting and when it comes to titration, do it only once but do t accurately from the beginning and then manipulate the other results to make a table, making many titrations is a wastage of time! And since there is no enthalpy so we are lucky for that!
Qualitative analysis will be easy too ^.^
Good luck

Do you know what's coming,any guess?

 

[HELLNO]

Do you know what's coming,any guess?

I only know the guesses for v31 and 32 ^.^

 

[Purple Chick]

My only advice which works really well with me is to read the whole question before starting and when it comes to titration, do it only once but do t accurately from the beginning and then manipulate the other results to make a table, making many titrations is a wastage of time! And since there is no enthalpy so we are lucky for that!
Qualitative analysis will be easy too ^.^
Good luck

can you please message me about the variants p32/31 chem so that i can have any idea through guess..

 

[techgeek]

When we invert the measuring cylinder in upward delivery, we have to fill it all with water, but when it's upside down, the bottom of the cylinder is ungraduted, like mine is below 25 cm3. So, any gs which collects in first 1 minute, is unable to be measured accurately. So for that, if I fill it only till 225 cm3, would it be fine? or will the air/oxygen at the top, will disturb our results?

 

[Zarak Asad Khan]

what color changes of different indicators and oxidising/reducing agents should we have memorized for the practical?

 

[bubbles1997]

hi! if anyone has a clue about tomorrow's practical, please do share it. V33

 

[Saad the Paki]

When we invert the measuring cylinder in upward delivery, we have to fill it all with water, but when it's upside down, the bottom of the cylinder is ungraduted, like mine is below 25 cm3. So, any gs which collects in first 1 minute, is unable to be measured accurately. So for that, if I fill it only till 225 cm3, would it be fine? or will the air/oxygen at the top, will disturb our results?

Yeah mine is the same but I believe they will just ask for the final total volume of gas and not at intervals. Yes the air at the top will disturb your results so you have to fill it till the top.

 

[Purple Chick]

hi! if anyone has a clue about tomorrow's practical, please do share it. V33

Hey bubbles, from some guesses it's about gas collecting experiment through water displacement and do prepare for alcohols, carboxylic acids and aldehyde & ketones !

 

[Saad the Paki]

I'm guessing we have to invert a measuring cylinder filled with water into a tub full of water. But how do we invert it such that no air bubbles enter the cylinder

 

[HELLNO]

I'm guessing we have to invert a measuring cylinder filled with water into a tub full of water. But how do we invert it such that no air bubbles enter the cylinder

There is a huge apparatus for that so it comes accurate!

 

[AnonymousX9]

Any guesses for 34? I'm doing it on 2nd june

 

[Lostsoul]

I'm doing 31,
Please share what's coming

 

[Hamody]

Plz could anyone calculate the enthalpy change for this question using the values already given It's urgent !!!

 

[Purple Chick]

hi! if anyone has a clue about tomorrow's practical, please do share it. V33

Plz could anyone calculate the enthalpy change for this question using the values already given It's urgent !!!View attachment 60677

subtract ans of reaction 1 from the ans of reaction 2
the sign is negative !

 

[Hamody]

But

subtract ans of reaction 1 from the ans of reaction 2
the sign is negative !

but why do they say in the mark scheme to subtract the ans of reaction 2 from ans of reaction 1 ?

 

[Hania Ahmer]

V34..???? Any guess abt phy, chemistry n bio?

 

[Purple Chick]

But

but why do they say in the mark scheme to subtract the ans of reaction 2 from ans of reaction 1 ?

To get the sign negative I guess, I haven't gone through it's mark scheme