Preparation of Calcium Carbonate Lab

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Preparation of Calcium Carbonate Lab
In this laboratory activity you will attempt to produce 1.00g of calcium carbonate from aqueous
solutions of calcium chloride and sodium carbonate. These solutions will be prepared from 2.01 g of calcium
chloride and 1.06 g of sodium carbonate
Materials:
3 beakers
100 mL graduated cylinder
squeeze bottle
rubber policeman
funnel
filter paper
Procedure:
1. Put on your safety goggles.
2. Obtain two clean beakers.
3. Obtain 2.01 g of calcium chloride and 1.06 g sodium carbonate at the weigh stations. You do not need
exactly those amounts. Enter the exact masses you measured into your data table.
4. Add the calcium chloride to one beaker. Add enough water (50 – 75 mL) to dissolve the calcium chloride.
Stirring will aid the dissolution process. Try to use a small amount of water so your filtration does not take
too long.
5. Add the sodium carbonate to the other beaker. Add enough water (50-75 mL) to dissolve the sodium
carbonate. Stirring will aid the dissolution process. Try to use a small amount of water so your filtration
does not take too long.
6. Pour the calcium chloride solution into the beaker containing the sodium carbonate solution. Record your
observations.
7. While waiting for the solid to settle, find the mass of a piece of filter paper. Record the mass in your data
table.
8. Set up a funnel, filter paper, and Erlenmeyer flask. Wet the filter paper with a small amount of water.
9. Pour the contents of the beaker slowly into the funnel. Be careful as you pour, so none of the solid flows
out of the filter paper or funnel. Use the bottle to remove as much of the solid from the beaker as possible
(I’ll show you how to do this at the start).
10. Once all of the solid is on the filter paper and the liquid has all drained through into the beaker, carefully
remove the filter paper from the funnel without opening it up and set put it in the drawer for your class.
You will obtain your final mass reading at the start of your next class.
11. Pour the filtrate down the drain and clean up all of your glassware and lab bench area.
Pre Lab Calculations:
1. Write the balanced chemical equation for the experiment.
2. Calculate the amount in g of sodium carbonate to be used in order to obtain 2.00g of calcium carbonate.
3. Calculate the amount in g of calcium chloride to be used in order to obtain 2.00g of calcium carbonate.
4. Given the initial amounts as specified in the introduction predict:
a. Which reactant will be the limiting and which will be the excess reagent
b. The theoretical yield
c. The % error if only 0.95 grams of calcium carbonate are recovered.
Data:
Create a table which includes at a minimum: mass of calcium chloride, mass of sodium carbonate, mass of dry
filter paper and mass of filter paper and dry solid. Make sure to include a space for observations of each.
Calculations:
1. Make a BCA table to confirm the limiting reactant.
2. What is the limiting reactant?
3. Determine the mass of calcium carbonate produced.
4. Determine your percent yield for calcium carbonate.
5. Determine the mass of excess reactant remaining. (Tricky)
Post Lab Questions:
1. How many grams of zinc carbonate are formed from the reaction of 5.11 g zinc sulfate and 3.25 g
sodium carbonate?
2. What was the limiting reactant from Question #1?
Conclusion:
Write a conclusion paragraph that includes the following: the purpose and whether or not it was accomplished, a
brief overview of the procedure, data discussion of results, discussion of possible errors and how they would
affect your results, and what concepts from class you had to apply to complete the lab.
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