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I-10
3.
What was the change in pH when
2 drops of HCl
was added to the water?
What volume of HCl was required
to change the pH of the buffer one full unit?
What volume of HCl was required
to change the pH of the buffer the second unit?
What volume of NaOH was required
to change the pH of the buffer one full unit?
What volume of NaOH was required
to change the pH of the buffer the second unit?
a)
Use the weak acid dissociation equilibrium
and LeChâtelier’s Principle to explain the effect of
adding H3O
+
(in the form of the strong acid
HCl) to the buffer solution.
i)
For the 1st
pH unit change. (1.0 mark)
ii)
For the 2nd
pH unit change. (0.8 marks)
