Lab 6: Mole-Mass Relationships

The purpose of this lab was to practice calculating theoretical yield and percent yield using the experimental data of a reaction of sodium bicarbonate and hydrochloric acid.  We also had to find the limiting reactant using the reaction NaHCO3 + HCl --> NaCl + CO2 + H2O by looking at the relationship of the reactants and products (how much product each reactant yielded).

Questions 1-4:

Our percent yield is lower than 100% most likely because some salt popped out during boiling or we didn't wait long enough for all the water to evaporate before weighing the dish.

The remaining solid in the evaporating dish after boiling.  The salt is a bluish color because the same dish
 was used in the copper sulfate hydrate lab, and the dish was probably not cleaned very well after use. It was
also interesting that the tongs left a yellow-greenish mark on the salt.