Chemistry Practice IA

Research question

What is the percent composition of CaCO3 (Calcium Carbonate) in an eggshell?

Procedure

Reaction: CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)

Separate egg shell from rest of egg and let it dry Use pestle and mortar to turn egg shell into fine powder Mass egg shell and record mass Fill a graduated cylinder with HCL Mass HCL and record mass Place egg shell powder into a beaker Pour HCL into the beaker and let the reaction occur Get filter paper and mass it Fold and wrap the filter paper around a funnel Pour solution into the funnel and use water to rinse it Let filter paper dry Once liquid is evaporated mass the filter paper Find mass of remaining egg shell Finally find percent composition of Calcium Carbonate in the egg shell