Urgent help needed on buffers
http://imgur.com/a/6JD0G
Hi, any help on part c would be appreciated as I struggle to work out the answer. Here is my working out: http://m.imgur.com/q2gwj0L The answer is 4.98 mol dm-3
Many thanks
Hi, any help on part c would be appreciated as I struggle to work out the answer. Here is my working out: http://m.imgur.com/q2gwj0L The answer is 4.98 mol dm-3
Many thanks
Original post by Pigster
You'll have worked out [H+], [A-] and [HA] (from the amounts of both).
When you add some HCl, work out the amount of HCl and then add that value to amount of HA; subtract it from the amount of A- (since A- + H+(from HCl) -> HA), Ka hasn't changes, so recalculate for H+ and hence pH.
When you add some HCl, work out the amount of HCl and then add that value to amount of HA; subtract it from the amount of A- (since A- + H+(from HCl) -> HA), Ka hasn't changes, so recalculate for H+ and hence pH.
Surely you will do HA- mole of HCl?
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