6. Mass of air-dried CaC2O4•H2O (g) ___________B. Determination of Limiting Reactant1. Limiting reactant in salt mixture ___________2. Excess reactant in salt mixture ___________Data Analysis1. Moles of CaC2O4•H2O precipitated (mol)Show calculation. ___________2. Moles of limiting reactant in salt mixture (mol)See equation 8.1. ___________3. Mass of limiting reactant in salt mixture (g)Show calculation. ___________4. Mass of excess reactant in salt mixture (g)
Equals mass of salt mixture minus mass of limiting reactant.Show calculation. ___________5. Percent limiting reactant in salt mixture (%)Show calculation. ___________6. Percent excess reactant in salt mixture (%) ___________4. b. For Trials 2 and 3, the percent CaCl2•2H2O in the mixture was 39.7% and 28.4% respectively.a. What is the average percent of CaCl2•2H2O in the sample? Data Analysis, B. b. What are the standard deviation and the relative standard deviation (%RSD) for the percent of CaCl2•2H2O inthe sample? Data Analysis, C and D.(these are all experimental work) Laboratory Questions 1. Part A.2. If the step for digesting the precipitate were omitted, will the reported “percent limiting reactant” in the salt mixture be too high, too low, or unaffected? Explain.
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- Summer '17