American University of Armenia Experiment 3 Reaction Stoichiometry Lab

Southern California University of Health SciencesGeneral Chemistry I
Name
Lab Report
Date
Laboratory Instructor
Report Form: Experiment 3 Reaction Stoichiometry
Sodium Bicarbonate NaHCO, Reaction Data
Mass of evaporating dish
Mass of evaporating dish + NaHCO3
Mass of NaHCO,
Mass of evaporating dish + Naci
Mass of NaCl (actual yield)
Sodium Carbonate Na.Co, Reaction Data
Mass of evaporating dish
Mass of evaporating dish+Na.co;
Mass of Na,co,
Mass of evaporating dish + NaCl
Mass of NaCl (actual yield)
Data Analysis:
Please provide sample calculations for each step of the calculation
39
General Chemistry I Southern California University of Health Sciences
Part A: NaHCO, Reaction
1. Convert the mass of NaHCO, used and mass of NaCl obtained to moles.
a. NaHCO
b. Naci
2. Determine the theoretical yield NaCl in the NaHCO, reaction. Show your work
3. Determine the percent yield for the NaHCO, reaction. Show you work.
4. Divide your answers from Question 1 by the lower mole value to determine the simplest mole-to-mole ratio
between NaHCO, and NaCl. Calculate your answer and then round them to the nearest whole number.
40
General Chemistry I Southern California University of Health Sciences
Part B: Na,CO, Reaction
1. Convert the mass of NaCO, used and mass of NaCl obtained to moles.
a. Na.Co
b. Naci
3. Determine the theoretical yield and percent yield of NaCl in the Na:COreaction. Show you work for each
step
4. Divide your answers from Question 1 by the lower mole value to determine the simplest mole-to-mole ratio
between NaCO3 and NaCl Calculate your answer and then round them to the nearest whole number.
41
General Chemistry I Southern California University of Health Sciences
Experiment 3 Reaction Stoichiometry: Post-Lab Exercise
Name
Date
Laboratory Instructor
Lab Day & Time
1. A student performed a reaction between NaHCO, and HCl and obtained a percent yield of 108%. What
experimental error(s) could have cause this to occur?
2. A 1.274 g sample of copper (I) sulfate was dissolved in water and allowed to react with excess zinc
metal. The reaction produced 0.392 g of copper metal.
a) Write the balanced equation for this reaction, including all phases.
b) What is the limiting reactant in this reaction?
c) What is the theoretical yield for this reaction?
d) What is the percent yield for this reaction?
42