chem p5 urgent doubt

[anushey]

can anyone of you plz solve question 2 of june 2009 P5 chemistry.
At first they have asked use to find solubility.
the formula given is: mass of solid/mass of water in saturated solution * 100
but somehow I cant get the solubility right.
Also I don't know how to find transistion temp.Actually my whole graph is wrong I think.
Can someone plz scan and show me the correct graph and how to find the transistion temp.

 

[iKhaled]

can anyone of you plz solve question 2 of june 2009 P5 chemistry.
At first they have asked use to find solubility.
the formula given is: mass of solid/mass of water in saturated solution * 100
but somehow I cant get the solubility right.
Also I don't know how to find transistion temp.Actually my whole graph is wrong I think.
Can someone plz scan and show me the correct graph and how to find the transistion temp.

what do u mean by u can't get the solubility? can u find the mass of solid and the mass of water?

 

[anushey]

what do u mean by u can't get the solubility? can u find the mass of solid and the mass of water?

.
I got the mass of water which is less than the mass of solid.
If I use the formula they have given so I will get solubility greater than 100.
have you solved it?

 

[iKhaled]

.
I got the mass of water which is less than the mass of solid.
If I use the formula they have given so I will get solubility greater than 100.
have you solved it?

yes, its ok u will get all the values above hundred thats not wrong

 

[anushey]

solubility cant be greter than 100.
someone who has done this please help.

 

[iKhaled]

solubility cant be greter than 100.
someone who has done this please help.

i have done this question correctly..believe me the solubility can be greater than one hundred and the graph i did is perfect even with 2 lines one at lower temperature and one at higher and they intersected at a temp of 67.5..if u dont wanna believe that the solubility can be greater than 100 then fine ur question will never be solved.

 

[anushey]

i have done this question correctly..believe me the solubility can be greater than one hundred and the graph i did is perfect even with 2 lines one at lower temperature and one at higher and they intersected at a temp of 67.5..if u dont wanna believe that the solubility can be greater than 100 then fine ur question will never be solved.

.
okay thanks.it will be grateful if you send me the pic of your graph.I redid the question with solubility greater than 100.but I cant find point of intersection in the graph

 

[iKhaled]

.
okay thanks.it will be grateful if you send me the pic of your graph.I redid the question with solubility greater than 100.but I cant find point of intersection in the graph

 

[anushey]

thanks a ton

 

[anushey]

most of the points are not lying on the best fit.Is it okay?

 

[iKhaled]

most of the points are not lying on the best fit.Is it okay?

yeah its fine!

 

[Ferr]

Can't we make a curve instead of line 1?

 

[xhizors]

I have drawn a curve for a lower temp plots in ms they also likely to see curves thanks btw

 

[zain786]

my graph was perfect that means but it took frikin 30mins to fill the table