Lab 6: Mole-Mass Relationships Lab

The purpose of this lab was to practice calculating theoretical yield and percent yield using our experimental data. We also had to find the limiting reactant of NaHCO3(s) + HCl(aq) => NaCl (aq) + CO2(g) + H2O(g) by looking at the relationship between the reactants and how much product they each produced. Overall, we found that NaHCO3 was our limiting reactant and we were able to successfully have a 100% yield.

Questions #1-#4

 

 

Even though our percent yield was 100%, I believe we did lose some mass when our remaining solid product popped once on the hot plate, but the small amount of water still left in the evaporating dish made up for that lost mass. The fluctuating of the scale is also another reason that error may occur and it could've possibly affected our percent yield if we did not read the scale as accurately as we did.

 

 



My lab partner and I also found it interesting that when we touched the tongs to the remaining solid in the evaporating dish, the solid turned into a yellow-green color due to contamination.