Chemistry: Post your doubts here!

[anastasia grey113]

it was red and colorless

yh
u sure chlorine doesnt dissolve in water?
like water wont turn green right?

 

[Zaki ali asghar]

THERE WAS CHLORINE? O.O

 

[anastasia grey113]

THERE WAS CHLORINE? O.O

It might've been electrolysed u know
cuz it was a concentrated solution
tho idk cuz like chlorine is evolved n they asked for colour of WATER ONLY

 

[SohaibButt]

i dont remember wut the question was exactly
i wrote no effect
tho many ppl said it was post to decrease

I wrote it will increase bcoz sucrose have greater Mr

 

[anastasia grey113]

I wrote it will increase bcoz sucrose have greater Mr

But greater Mr means lesser moles for the same mass and lesser no. of particles

 

[sterryfox]

what did you use to remove the arsenic compound from water

 

[SohaibButt]

But greater Mr means lesser moles for the same mass and lesser no. of particles

Yeah but we need to divide it's mol with water right? Then ultimately ratio will decrease

 

[anastasia grey113]

what did you use to remove the arsenic compound from water

AlCl3
wbu?

 

[anastasia grey113]

Yeah but we need to divide it's mol with water right? Then ultimately ratio will decrease

lol idk man i wrote no effect so mine was wrong anyway :/

 

[SohaibButt]

lol idk man i wrote no effect so mine was wrong anyway :/

Oh right but what u wrote abt thermometer?

 

[anastasia grey113]

Oh right but what u wrote abt thermometer?

well the change was too small to be measured with it so had to use a probe

 

[Zaki ali asghar]

shit, i wrote about the insufficient range. was about to write that it's not sensitive at higher temp but the time got over.

 

[Hassaan M. Khalil]

Any P51 here?

 

[sterryfox]

why was the temperature not 100 degrees

 

[anastasia grey113]

shit, i wrote about the insufficient range. was about to write that it's not sensitive at higher temp but the time got over.

ohhhhhh its ok
just make up for wut u lost in p4
n pray that the threshold for p5 is low
but considering the variety of mistakes all of us have made, i think it may be lower than 24

 

[anastasia grey113]

why was the temperature not a 100 degrees

The pressure was high
tho i wrote low -.-

 

[Zaki ali asghar]

IT WAS HIGH? really? i wrote first that it was low but then changed to high. i really hope the threshold is around 20

 

[anastasia grey113]

IT WAS HIGH? really? i wrote first that it was low but then changed to high. i really hope the threshold is around 20

yh well thaz wut my friends said
yh same
n idk but i found it slightly trickier than mj 2017 n it had a threshold of 24
so i think itll be lower than that this time

 

[Zaki ali asghar]

being a pessimist asking this, can you still score an A* with a B in P5 but all other As?

 

[Holmes]

I wrote AlCl3

that's right but I wrote KCL instead