1.
Benzoic acid, C6H5COOH is an organic compound which is widely used as food
preservative. If a beaker is filled with 1.21 M aqueous solution of benzoic acid,
calculate:
[$K_a$ for benzoic acid = 6.5 \times 10^{-5}]
a)
the pH of the aqueous solution of benzoic acid
(8 marks)
b)
the concentration of all species present (C6H5COO$^{-}$, C6H5COOH, OH$^{-}$) in the
aqueous solution of benzoic acid.
(4 marks)
c)
the percentage of dissociation of aqueous solution of benzoic acid.
(2 marks)