2. Methyl orange could be used as indicator in the sodium carbonate hydrochloric acid standardisation. Boiling is not necessary in this case, because methyl orange changes colour from pH 4.4 to pH 3.0 and is therefore not affected by dissolved carbon dioxide. However, despite this advantage, methyl orange is not so suitable as methyl red. Consider the table below for titration of 25ml. Amount of HCI added (ml) pH Amount of HCI added (ml) pH 24.50 11.0 25.02 4.4 24.80 10.6 25.05 4.0 24.90 24.95 10.3 10.0 25.10 25.20 3.7 3.4 24.98 9.6 25.50 3.0


Suggest a reason why methyl orange is not suitable as an indicator, and calculate the "indicator error" involved.​