Stoichiometry of a Precipitation Reaction
LAB REPORT 7 – STOICHIOMETRY OF A PRECIPITATION REACTION
No credit will be given for this lab report if the Data section is not completely filled out.
NOTE: This experiment may take several days to complete.
OBJECTIVE 1. Predict the amount of product produced in a precipitation reaction using stoichiometry 2. Accurately measure the reactants and products of the reaction 3. Determine the actual and theoretical yield 4. Calculate percent yield
PROCEDURE
Please complete the entire experiment as instructed in the lab manual except for any modifications noted below. Fill out the report below, insert your digital photograph(s) into the report, and submit it me electronically to the email address acarrawa@mcc.cc.ms.us.
DATA AND OBSERVATIONS (15 points)
INSERT THE FOLLOWING DIGITAL PHOTOGRAPHS OF YOURSELF : (5 points) * Measuring the CaCl2 * Stirring the reaction mixture * Folding the filter paper * Pouring the reaction mixture into the filter paper in the funnel * Placing the product on the paper towels to dry
Experimental Step | Observations | Mass of CaCl2•2 H2O used (grams) | | Mass of Na2CO3 used (grams) | | Net mass of mixture, grams | | Appearance of mixture when the reactants are mixed together | | Mass of filter paper (grams) | | Appearance of dry product | | Mass of filter paper and dry product (grams) | | Mass of dry product (grams) | | Actual yield (grams) | | Theoretical yield (grams) | | Percent yield | |
QUESTIONS (9 points)
1. If you had not been told the identity of the solid you formed in this reaction, how could you have determined it? 2. Should you ever allow the liquid level to rise above the height of the filter paper in the funnel? 3. Show your calculation of how much Na2CO3 you should use. (NOTE: To calculate the molar mass of CaCl2•2 H2O, calculate the molar mass of CaCl2 and then add twice the molar mass of H2O.) – 2 points 4.
No credit will be given for this lab report if the Data section is not completely filled out.
NOTE: This experiment may take several days to complete.
OBJECTIVE 1. Predict the amount of product produced in a precipitation reaction using stoichiometry 2. Accurately measure the reactants and products of the reaction 3. Determine the actual and theoretical yield 4. Calculate percent yield
PROCEDURE
Please complete the entire experiment as instructed in the lab manual except for any modifications noted below. Fill out the report below, insert your digital photograph(s) into the report, and submit it me electronically to the email address acarrawa@mcc.cc.ms.us.
DATA AND OBSERVATIONS (15 points)
INSERT THE FOLLOWING DIGITAL PHOTOGRAPHS OF YOURSELF : (5 points) * Measuring the CaCl2 * Stirring the reaction mixture * Folding the filter paper * Pouring the reaction mixture into the filter paper in the funnel * Placing the product on the paper towels to dry
Experimental Step | Observations | Mass of CaCl2•2 H2O used (grams) | | Mass of Na2CO3 used (grams) | | Net mass of mixture, grams | | Appearance of mixture when the reactants are mixed together | | Mass of filter paper (grams) | | Appearance of dry product | | Mass of filter paper and dry product (grams) | | Mass of dry product (grams) | | Actual yield (grams) | | Theoretical yield (grams) | | Percent yield | |
QUESTIONS (9 points)
1. If you had not been told the identity of the solid you formed in this reaction, how could you have determined it? 2. Should you ever allow the liquid level to rise above the height of the filter paper in the funnel? 3. Show your calculation of how much Na2CO3 you should use. (NOTE: To calculate the molar mass of CaCl2•2 H2O, calculate the molar mass of CaCl2 and then add twice the molar mass of H2O.) – 2 points 4.