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Paper 5 Tips !! :)

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Their would be to lines one at higher temperatures (solubility temperature) and the other at lower temperature (crystals appearing)
on x-axis Temperatures and on Y-axis Solubility
u extend both of these lines and the point of intersection is their transition temperature!

Yeah exactly,i did get two curves and when i checked with the marking scheme, it says that the first line (at lower temp) has a steeper gradient and vice versa while i got the oppposite. Is the transition temp around 49C?? Plus all my solubilities were above 100! Is that corrct??
 
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when they ask us to calculate solubility and say :
"The units of solubility are grams per one hundred grams of water (g / 100g water)." What does this mean???? and what formula do we use?
thanx in advance
 
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when they ask us to calculate solubility and say :
"The units of solubility are grams per one hundred grams of water (g / 100g water)." What does this mean???? and what formula do we use?
thanx in advance
the unit means how many grams of the "solute" dissolves (soluble) in 100g of water
 
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Yeah exactly,i did get two curves and when i checked with the marking scheme, it says that the first line (at lower temp) has a steeper gradient and vice versa while i got the oppposite. Is the transition temp around 49C?? Plus all my solubilities were above 100! Is that corrct??
this is my graph.. u rely havin troubl wit tat qustn ha..hope it hlps!!
 

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MJ 2011 52 can any one check if my solution is correct?

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this is my graph.. u rely havin troubl wit tat qustn ha..hope it hlps!!
Omg,thankyou soo much!!! Turns out my coordinates were correct,i just drew curves instead of lines! :/
Yes,i was really stressed out after doing this qn! Really helped! Thanks again! :)
 
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is t
Expt has to be commenced on a given temp say 30*C for expt 1
u set the temp of a water bath
u place the conical flask in water with mixture u measure temp and start stopwatch when 30*C hits
at this point temp of water in bath = mixture of solution in flask as they are in equilibrium (zeroth law)
if u start stopwatch before 30*C hits u measure rate for x-30*C
now tell me which part is unclear!
is thermometer to be placed in water bath or conical flask
 
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