Acid question (1 Viewer)

[ND]

Do di or triprotic strong acids completely disassociate in water? My teacher says that only the 'first' H will completely disassociate, which the 2nd disassociating to a lesser degree and so on, but i saw a q. that asked to find the pH of a 1M sulfuric acid solution. If they do not completely ionize, then this question wouldn't be possible to calculate.
Thanks.

 

[elizabethy]

i think they do ...i m not sure but.....
H2SO4 is stronger than HCl ( if i remember properly) so this means it ionises more than HCl which means it shud disassociate ....... someone correct me pls!!!!

 

[kini mini]

Originally posted by ND
Do di or triprotic strong acids completely disassociate in water? My teacher says that only the 'first' H will completely disassociate, which the 2nd disassociating to a lesser degree and so on, but i saw a q. that asked to find the pH of a 1M sulfuric acid solution. If they do not completely ionize, then this question wouldn't be possible to calculate.
Thanks.

Your teacher is correct - but for the purposes of the question you may assume complete disassociation becuase in the ansence of any other data the problem is insoluble .

 

[ND]

Ah ok, thanks.