Mole-Mass Relationships Lab

         In this lab, the purpose of the lab was to use stoichiometry to find the percent yield of the solid product by first finding the theoretical yield of NaCl and plugging that in. 

         In this experiment, NaHCo3 and HCl was combined to form NaCl, CO2 and H2O. In order to achieve this, 2.04 grams were added to the evaporation dish and mixed with the acid HCl. Then to separate the H2O, the hot plate was used to evaporate the water and leave only the salt. 

1. NaCO3 is the limiting reactant because    there is a limited amount and is the only reactant not to be renewed. 

2. The theoretical yield of was 1.42 grams found by using proportions to cancel units out.

3. The mass of the remaining solid product after the evaporation of water is 1.38 found by subtracting 44.83 (mass of evaporating dish) from 46.31 (mass of e.d + remaining solid product).

4 The percent yield for this experiment is 97.2 found by dividing the actual yield (1.38) by the theoretical yield (1.42) times hundred. 

I believe the reason why our result was so close yet not exact was the way we were heating the products of the equation for. The more you heated it, the more water and grams fell.