Q9 · Practice questionSimple familiar1 mark
QUESTION 9
A weak monoprotic acid is titrated with sodium hydroxide at . Which statement about the equivalence point is correct?
(A)
Its pH is always 7.00.
(B)
The acid and base volumes must be equal.
(C)
The conjugate base makes the solution alkaline.
(D)
Half the original acid remains undissociated.
WORKED SOLUTION
1 markAnswer C
C
At equivalence the conjugate base hydrolyses, producing hydroxide. Equal moles do not imply equal volumes.
- Select C. [1 marks]
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