A. Precipitation of CaC₂O4•H2O from the Salt Mixture
1. Mass of beaker (g)
Trial1: 103.32
Trial 2: 104.21

2. Mass of beaker and salt mixture (g)

Trial 1: 104.43
Trial 2: 105.29

3. Mass of salt mixture (g)

Trial 1: ??
Trial 2: ??

4. Mass of filter paper (g)
Trial 1: 0.69
Trial 2: 0.71
5. Mass of filter paper and product after air-dried
or oven-dried (g)
Trial1 : 1.02
Trial 2: 1.06
6. Mass of dried product (g)

Trial 1: ??
Trial 2: ??
7. Formula of dried product

Trial 1: ??
Trial 2: ??

B. Determination of Limiting Reactant
1. Limiting reactant in salt mixture (write complete formula)
2. Excess reactant in salt mixture (write complete formula)

Data Analysis
1. Moles of CaC₂O4•H₂O (or CaC₂O4) precipitated (mol)

2. Moles of limiting reactant in salt mixture (mol)

Trial 1: ??
Trial 2: ??

• formula of limiting hydrate?

3. Mass of limiting reactant in salt mixture (g)

Trial 1: ??
Trial 2: ??

4. Mass of excess reactant in salt mixture (g)

Trial 1: ??
Trial 2: ??

•formula of excess hydrate.
5. Percent limiting reactant in salt mixture (%)

Trial 1: ??
Trial 2: ??

6. Percent excess reactant in salt mixture (%)

Trial 1: ??
Trial 2: ??

7. Mass of excess reactant that reacted (g)

Trial 1: ??
Trial 2: ??

8. Mass of excess reactant, unreacted (g)

Trial 1: ??
Trial 2: ??

*Show calculations for Trial 1 on next page.