The purpose of this lab was to use titration techniques to calculate the amount
of calcium carbonate in an eggshell. An eggshell was weighed, crushed, and
around 0.5 g of the crushed eggshell was added to 50 ml of 1 M HCl for each
titration. Phenolphthalein indicator was added and then the solution was
titrated with 1 M NaOH until a slight pink color appeared. 2 or 3 trials
were done, and calculations were performed to find out the following: equations
for the two chemical reactions, volume of HCl that reacted with NaOH, the volume
of HCl that reacted with calcium carbonate in the eggshell, the moles of calcium
carbonate that reacted with the eggshell, and finally the percent composition of
calcium carbonate in the eggshell.