hsc assessment one (1 Viewer)

[SalButtsworth]

i dunno if we all get the same assessment task but i have one for this subject. i have to try to find solubility of pure substances in ethanol (alcohol)
anyone got any ideas???

 

[damianI]

you have to control temperature because substances have different solubilities at different temperatures so that is a variable

 

[damianI]

also use 100mL of ethanol and use saturated or excess solute, filter out the undissolved mass, measure this mass and deduct it from the original mass of solute placed into the ethanol. Then the solubility can be measured in g/100mL

 

[SalButtsworth]

haha thankyou that helps heaps.. wat sort of substances do u think i should use?? i was thinking becuase they have to be as close to pure as they can be that i will use bicarb soda, citric acid (lemon juice) and the blue crystals that u can buy at a hardware store lol im having a mind blank right now..

 

[iMAN2]

use pure/distilled water (does it float, dissolve etc).

paint..not pure though.

blue crystals - copper sulfate?

btw is this experiment ur doing in a school lab or at home?