Chemistry: Post your doubts here!

[anastasia grey113]

what do u guys think about the Kb ( constant for pure water)?

wut abt it?
tho idk how to rate this paper
it was very different
n yh i rechecked last year's threshold
i think the threshold will shoot to 195 this time

 

[Raiyan Zaman]

What will be tge observation on the anode and cathode? I wrote red ppt and gas evolves

 

[derriclim]

what would be the change in Kb if sucrose was used?

 

[anastasia grey113]

What will be tge observation on the anode and cathode? I wrote red ppt and gas evolves

they asked for colour of water
i did colourless and red

 

[Zaki ali asghar]

it was red and colorless

 

[anastasia grey113]

what would be the change in Kb if sucrose was used?

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

 

[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