Qualification > Sciences

Edexcel CHEMISTRY DOUBTS!!!!

<< < (333/347) > >>

Malak:
^ Oh, thank you :D

Another doubt (attached)

Q18 part c (ii)
Why do we use the moles and not the concentration given :s

The Golden Girl =D:
I think most probably that is the case because when you put the Volumes , they cancel out.

I hope I helped (:

~ Miss Relina ~:
what is the PH of 0.5 moldm-3 ammonia solution given Kb= 1.8 x 10-5 ;)

Malak:

--- Quote from: ~ Miss Relina ~ on January 22, 2012, 08:04:02 pm ---what is the PH of 0.5 moldm-3 ammonia solution given Kb= 1.8 x 10-5 ;)

--- End quote ---
You dont need to know that.
I know the old papers have this but if you check the specification. I doesn't mention Kb anywhere

~ Miss Relina ~:

--- Quote from: Ang3l on January 22, 2012, 08:08:15 pm ---You dont need to know that.
I know the old papers have this but if you check the specification. I doesn't mention Kb anywhere

--- End quote ---
but I didn't see it  in old pastpapers actually it is in the Edxecel chemistry blue book

Navigation

[0] Message Index

[#] Next page

[*] Previous page