Add juice one drop at a time to 5 ml. of indicator solution in the test tube until the indicator
solution changes from blue to colourless or until the solution no longer changes colour. This is
the endpoint. Repeat for each beverage. Observe and count the numbers of drops of orange
beverage added to the indicator to cause it to lose its colour or to stop changing colour. Record
the number of drops. (Dipaolo, 2002, p. 1)