Calculate how many moles of CaCl2•2H2O are present in 1.50 g of CaCl2•2H2O and then calculate how many moles of pure CaCl2 are present in the 1.50 g of CaCl2•2H2O. Record the answers in Data Table 1. Use the information and examples provided in the Exploration and the values recorded in Data Table 1 from Step 8 to determine how many moles of Na2CO3 are necessary to reach stoichiometric quantities. From that calculation, determine how many grams of Na2CO3 are necessary to reach stoichiometric quantities.
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Calculate how many moles of CaCl2•2H2O are present in 1.50 g of CaCl2•2H2O and then calculate how many moles of pure CaCl2 are present in the 1.50 g of CaCl2•2H2O. Record the answers in Data Table 1.
Use the information and examples provided in the Exploration and the values recorded in Data Table 1 from Step 8 to determine how many moles of Na2CO3 are necessary to reach stoichiometric quantities. From that calculation, determine how many grams of Na2CO3 are necessary to reach stoichiometric quantities. Record both values in Data Table 1.
| Initial: CaCl2 x 2H20 (g) | 1.50 g |
| Initial: CaCl2 x 2H2O (mol) | 147.02 g/mol |
| Initial: CaCl2 (mol) | 0.0102 mol |
| Initial: NaCO3 (mol) | 106 g/mol |
| Initial: NaCO3 (g) | |
| Theoretical: CaCO3 | 1.02 g |
| Mass of filter paper | 1.2 g |
| Mass of filter + CaCO3 | 2.6 g |
| Actual: CaCO3 (g) | 1.4 g |
| % yield |
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hello- i have the same experiment, however after determining moles of CaCl2x2H20 it is asking for the mols present in PURE CaCl2. How is this found?
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