Subject:
Mohamed Shalan Chemistry Lab Mole Relationships in Chemical Reactions Objectives: React known mass of NaHCO3 with excess HCl Calculate the mole relationship between NaHCO3 and the solid product, NaCl Produce balanced equation for the reaction Determine whether your results support the law of conservation of mass-energy Table 1 Mass of empty evaporating dish 99.79 g Mass of evaporating dish + NaHCO3 102.38 g Mass of NaHCO3 2.59 g Mass of evaporating dish + NaCl 101.55 g Mass of NaCl 1.76 g Balanced Equation: NaHCO3 + HCl CO2 + H2O + NaCl 2.59 g NaHCO3 x 1 mol NaHCO3 x 1 mol NaCl x 58.49 g NaCl = 1.80 g NaCl 84.01 g NaHCO3 1 mol NaCHO3 1 mol NaCl 1.76 g NaCl x 100 = 98.3% percent yield 1.80 g NaCl Conclusion:
