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Potassum Iodide colour change is brown to colourless or colourless to BRown

I remember it was 79% but i think they might award u a mark

Urdu A or B??

Is there ecf in titration qs. cuz i messed up the last parts :(

For part (d) 35g/50cm^3 is 70g/100cm^3 From your graph where solubility is 70g/100cm^3 u find the temperature For part (e) you find the solubility when temperature is 50 Then subtract both the solubulities i.e 150 - (whatever answer u get) You'll find the mass which crystallises out

Thanks for the follow bro!! :)

Which subjects r u taking this year??

:)

Not much!! But in ur formula u convert it into dm^3 to solve further. But here u need to put in the values and voila!! :)

Use the formula which I mentioned its more simple :)

Its simple. You know the volume. Moles can be calculated by the formula moles = conc./1000 x volume moles = 0.100/1000 x 44 moles = 0.0044

Urdu A was easy :)

Copper is less reactive than Hydrogen It all depends on the Reactivity Series. The more reactive metal displaces the less reactive metal E.g: Sodium + Calcium Hydroxide = Sodium Hydroxide + Calcium

B

Can u give an example??

A

:unsure: Well that part was where I ended with the problems .

Lucky people. I have urdu after the weekend and then chem ATP Would be doing a little bit of urdu today

i guess 100 words