chemistry practical doubts for paper 34

[snowbrood]

post your doubts here lets see if someone could help us.
well my query is that how to know if a solution has a ppt or has no ppt . i think if we put a white paper with the testtube and if we can see that white paper through test tube that there is no ppt is my assumption right correct me

 

[mrnt3250]

If the solution is colourless (like clean water), it means there is no precipitate.
You can also leave the solution for a while to sit, and then against the white tile to see if there's any ppt.

 

[ardis19]

I think it would be better if you compare it with distilled water or tap water.

 

[Alool]

did anyone solve this paper?
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_y07_sp_31.pdf