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A 25mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added until the indicator changed colour. It was found that 28mL of the alkali was used.
What colour was the solution in the flask at the start of the titration?
What colour did it turn to when the acid had been neutralized?
Was the alkali more concentrated or less concentrated then the acid?

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