Chem question (1 Viewer)

[ZaoKai]

Does anyone know how to work out this question? The ans is C. Thanks.

 

[carrotsss]

What’s this question from? I feel like I remember having a problem with it in a paper at some point

 

[ZaoKai]

What’s this question from? I feel like I remember having a problem with it in a paper at some point

2019 CSSA

 

[Unovan]

 

[Unovan]

You assume because the precipitate is very faint that the concentrations will be equal to the ksp value, at least that was the way I found to get to 0.32g

Should probably have written that in the working but they won't take marks away in hsc for not mentioning assumptions

 

[ZaoKai]

You assume because the precipitate is very faint that the concentrations will be equal to the ksp value, at least that was the way I found to get to 0.32g

Should probably have written that in the working but they won't take marks away in hsc for not mentioning assumptions

I get it. Thanks so much