Explain the differences in the pH of the following solutions:
(a) 0.1 M HCl and 0.1 M CH3COOH
(b) 0.1 M NaOH and 0.1 M NH4OH
Suppose you tested 3 samples of an unknown solution "X", with
each of the three indicators used in this experiment and you obtained the
(i) on adding methyl orange, the solution is yellow
(ii) on adding bromothymol blue, the solution is yellow
(iii) on adding phenolphthalein, the solution is colourless
Using the information you obtained with regard to the pH at which these indicators
change colour, deduce the pH of the unknown solution "X".
How does the pH of a buffer solution change when acid or base is added to
it compared with when the acid or base is added to distilled water?