help! (1 Viewer)

[dancingindarain]

hey im having a bit of trouble with this question..

Calculate the concentration of [OH] in a 0.45M solution of NH3
(Kb = 1.8 times 10 to the power of negative five(logs))

Thanks heaps

 

[undalay]

I think this question is slightly out the HSC syllabus.

Here's a hint if you want to try anyway:
First try to find [H], next try to recall how [H] and [OH] is related.

 

[bored of fail 1]

thats way too easy, just drop out now

 

[s2 SEductive]

[h+][oh-] = 10^-14 ?

 

[Jonneeh]

I bet im totally wrong but ohwell
Stab in the dark.
NH3 + H2O ->NH4 + OH
Moles NH3 = Moles OH
Dont know where im going with this but would the [OH] also be 0.45M?