Chemistry: Post your doubts here!

[Zaki ali asghar]

MY SUGGESTION TO EVERYONE HERE IS TO FORGET CHEMISTRY FOR NOW AND STICK TO PHYSICS P4.
IT"S NO USE CRYING OVER SPLIT MILK.
I ALSO HAD A HORRIBLE DAY TODAY, BUT IT'S LIFE GUYS.
IT IS WHAT IT IS.

thank u for this lol. i am here sitting with physics notes in one hand but still cant get over losing those 1 1 marks

 

[anastasia grey113]

it was the minimum amount of moles needed to form a solution, wouldn't the one with the least be more effective?

yh but for arsenic we had to find out and arsenic is negatively charged unlike iron
the results shown were for iron only
for arsenic i think the trend was post to be opposite cuz it was oppositely charged

 

[anastasia grey113]

thank u for this lol. i am here sitting with physics notes in one hand but still cant get over losing those 1 1 marks

11?
oh i think i lost 6 lol
dw if u lost 11 many others would have done the same mistakes as well
the threshold will be down to 21 at least
n also goes as low as 18 at times

 

[Zaki ali asghar]

no i mean, losing marks in the 1 1 mark questions. i guess i lost around 7

 

[anastasia grey113]

MY SUGGESTION TO EVERYONE HERE IS TO FORGET CHEMISTRY FOR NOW AND STICK TO PHYSICS P4.
IT"S NO USE CRYING OVER SPLIT MILK.
I ALSO HAD A HORRIBLE DAY TODAY, BUT IT'S LIFE GUYS.
IT IS WHAT IT IS.

*sigh* dude ive had a bad day too
n wuts worse is that i got bio tomorrow

 

[anastasia grey113]

no i mean, losing marks in the 1 1 mark questions. i guess i lost around 7

ohhhhhhhhh yh
well idk i lost many too
now i think i lost 7 too lol

 

[LonelyStudent]

I would also suggest everyone now take a look at Biology P4, as that's whats coming next.

 

[Zaki ali asghar]

what was the independent variable?

 

[Cherry lava]

The pressure was low guys because the boiling point of water was below 100 and boiling point is lower when the atmospheric pressure falls from its orginial 101kPA value.

I wrote the apparatus was air tight, no atmospheric pressure.
Is it correct ?

 

[anastasia grey113]

what was the independent variable?

charge on cation
lol btw i have my bio notes beside me too

 

[anastasia grey113]

I wrote the apparatus was air tight, no atmospheric pressure.
Is it correct ?

it wasnt air tight i think
an open end was shown
if that has been the case, the flask would have exploded because of the boiling water
thaz wut i think
it might be correct

 

[Zaki ali asghar]

finally a right one lol, i guess it comes down to 22-23/30 i hope the threshold is 20!!!

 

[Holmes]

*sigh* dude ive had a bad day too
n wuts worse is that i got bio tomorrow

best of luck for BIO

 

[anastasia grey113]

finally a right one lol, i guess it comes down to 22-23/30 i hope the threshold is 20!!!

yh lol same xD yh les pray for that
if its low for p5, itll defo be around 190 for an A*

best of luck for BIO

yh thx :'')

 

[LonelyStudent]

best of luck for BIO

You too buddy.

 

[Holmes]

You too buddy.

Thanks! but I am not a Biology student!

 

[Fardeen3342]

The reason I choose KCL was that it required the least amount of moles as compare to others, like the concentrations were given so you could calculate the amount required and because it was talking about cation as well.

So in the question I recall kcl having lesser moles to make a PPT and alcl3 had the most required moles for the positive ion fe203
In the next part the asked for arsenic saying it's negatively charged and said which one will be more efficient . So if alcl3 needed the most moles for the positive ion to form a PPT hence it would need the least for negative ion hence I wrote alcl3 I related it to the I - and s2O8 - reaction we learnt in theory that says similar charge reactions are less feasible .

 

[anastasia grey113]

So in the question I recall kcl having lesser moles to make a PPT and alcl3 had the most required moles for the positive ion fe203
In the next part the asked for arsenic saying it's negatively charged and said which one will be more efficient . So if alcl3 needed the most moles for the positive ion to form a PPT hence it would need the least for negative ion hence I wrote alcl3 I related it to the I - and s2O8 - reaction we learnt in theory that says similar charge reactions are less feasible .

YESSSSS THAZ EXACTLY Y I CHOSE ALCL3.

 

[Error Syntax]

YESSSSS THAZ EXACTLY Y I CHOSE ALCL3.

well there goes my two marks XD. Yeah you guys are right the logic adds up.

 

[anastasia grey113]

well there goes my two marks XD. Yeah you guys are right the logic adds up.

lol its ok
m pretty sure youll do well in p4 to make up for it
thank God m still getting a 25 xD