Determining the Percent Yield of Calcium Carbonate
Purpose:
To compare the theoretical amount to the actual amount of calcium carbonate and calculate its percent yield in the reaction between solutions of sodium carbonate and calcium chloride.
Materials:
stirring rods
fine filter paper
2 small beakers
0.8 – 1.2 g of sodium carbonate
Erlenmeyer flask
electronic balance
graduated cylinder
safety glasses
2 g of calcium chloride
deionized water
funnel
retort stand
ring clamp
Safety Procedures:
Sodium carbonate and calcium chloride are both harmful if swallowed or inhaled and may cause irritation to skin, eyes and respiratory tract. Safety goggles, and proper attire are to be worn at all times during this experiment. In particular, no loose clothing should be worn and long hair should be tied back.
Procedure:
- The filter paper was measured for mass.
- The clean, dry beakers were measured for mass. The sodium carbonate was added to one beaker and the calcium chloride was added to the other beaker. The beakers were measured for mass again.
- About 25 mL of deionized water was added separately to each beaker. The solutions were stirred with the stirring rods until the solids were dissolved.
- The calcium chloride solution was poured into the sodium carbonate solution.
- The filter paper was adjusted on the funnel so as to completely cover its inside. The funnel was placed on the ring clamp that was mounted on the retort stand. The Erlenmeyer flask was placed right under the funnel.
- The mixture was filtered to collect the solid into the filter paper. A small quantity of water was added to the beaker to wash out the remaining solid.
- After the filtering was complete, two separate 10 mL quantities of deionized water were poured through the filter paper.
- The filter paper was measured for mass.
