A student titrates a 25.0 cm3 sample of 0.0800 mol dm-3 aqueous ammonia with 0.100 mol dm-3 nitric acid.
Which indicator and what volume of nitric acid are most appropriate to determine the equivalence point of this titration?
Indicator: Methyl orange; Volume: 20.0 cm320.0\text{ cm}^320.0 cm3
Indicator: Phenolphthalein; Volume: 20.0 cm320.0\text{ cm}^320.0 cm3
Indicator: Methyl orange; Volume: 31.3 cm331.3\text{ cm}^331.3 cm3
Indicator: Phenolphthalein; Volume: 31.3 cm331.3\text{ cm}^331.3 cm3
