Equivalence Point (1 Viewer)

[flynn]

I can't figure out why equivalence point in a titration, which i understand to be when the two substances have neutralised one another, i can't figure why that point isn't when pH = 7.

Can anyone please explain why neutralisation point has different pH values in different reactions?

thanks

 

[Tommy_Lamp]

It depends on whether it is a Strong or Weak Acid reacting with a Strong or Weak Base
Strong Base + Weak Acid = Basic Salt pH>7
Weak Base + Strong Acid = Acidic Salt pH<7
Strong Base + Strong Acid = Neutral Salt pH=7

 

[smallcattle]

yeah that...

i was gonna type up something but never mind

 

[flynn]

i thought it had something to do with the pH of the salt formed.
thanks for your help

 

[Jezzabelle]

it is about the salt formed.... weak acid + strong base gives a basic salt... that raises pH etc etc

 

[Paroissien]

Hahah. Way to answer a question thats already been answered

 

[sHin]

I think it would be wiser to say that the solution formed is neutral/acidic/basic.
For e.g. a titration between HCl and Na2CO3 would result in a NaCl, which is neutral. It is the H2O and CO2 that makes the equivalence point acidic.