Plz help!!!

[Keeemoman]

Please help!!
I need to know when to filter a solution and when to crystallise it and when to heat in a crucible and also I need to know when to use an evaporating dish and lastly I need to the soluble and insoluble salts


Thnx in advance!!!!!!!!

 

[Ali4lyf]

Fileration and crystallisation means that you need some thing in precipitate (Solid salt) form and ofc heat it aswell to get pure crystal forms.
whenever crystals are hydrated (with water) we need to evaporate it to remove water from it before it starts melting.
You can differentiate btw soluble and insoluble salts by few methods (like b.p,m.p,condesation.etc)

HOPE IT HELPED =)
Pray for me in return thanks.
Hope we do well in tommorow exam and up coming exams InshAllah.

Regards,

 

[Keeemoman]

It helped thnx bro but still I didnt get when to use crystallization and when to use filtration

 

[brainiac]

here u go the table i made for soluble and insoluble salts ........... kindly dont mind the drawing as i m not good at it


now coming towards ur problems
1:we use filtration when we have to sperate soluble and insoluble salts
2:we use crystallization when we seperate a solid by cooling either its solution or molten liquid
3:we use evaporation when we seperate a soluble solid


hope u get it .................. good luck for ur exams :good: :good: :good: :good: :good:

 

[Keeemoman]

Like for filtration u seperate sand from sugar solution
Is this correct !!!!!

 

[brainiac]

yup

 

[brainiac]

 

[Keeemoman]

wat do u mean by miscible and suspension

 

[brainiac]

miscible liquids r those liquids which completely dissolve in one another forming a single layer
suspension is a state in which small insoluble solid particles are spread throughout the solution