Chemistry Help

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Gravimetric Analysis Table 1: Data and Observations

Mass

CaCl2 : 2.0 g

K2CO3 : 2.5 g

Filter Paper 2.1 g

Watch Glass 35.4 g

Precipitate .6

(after deduction filter paper & watch glass)

Table 2: 24 Hour CaCl2

Observations

24 hour CaCl2 The substance was initially a white powdery substance when weighed in the weigh boat. After the 24-hour sitting period the

substance turned to liquid.

Post-Lab Questions

1. Calculate the theoretical yield of the solid precipitate. Show your work.

2. Use Question 1 to calculate the percent yield of the solid precipitate. Show your work.

3. Based on your actual yield, calculate the mass of calcium present in the original solution.

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Gravimetric Analysis 4. Analyze the data and determine the experimental concentration of calcium chloride in

the solution. Show all calculations and report in % wt/v concentration.

5. Calculate the theoretical concentration of calcium chloride.

6. Create a bar graph comparing the theoretical to actual percent concentrations of calcium

chloride in the solution. Then, calculate percent error.