Question

PROCESSING THE DATA 1. Determine the difference in freezing temperatures, ?t, between the pure lauric acid (t?) and the mixture of lauric acid and benzoic acid (t?). Use the formula, ?t = t? - t?. 2. Calculate molality (m), in mol/kg, using the formula, ?t = Kf · m (Kf = 3.9°C-kg/mol for lauric acid). 3. Calculate moles of benzoic acid solute, using the answer in Step 2 (in mol/kg) and the mass (in kg) of lauric acid solvent. 4. Calculate the experimental molecular weight of benzoic acid, in g/mol. Use the original mass of benzoic acid from your data table, and the moles of benzoic acid you found in the previous step. 5. Determine the accepted molecular weight for benzoic acid from its formula, C?H?COOH. 6. Calculate the percent error.

          PROCESSING THE DATA
1. Determine the difference in freezing temperatures, ?t, between the pure lauric acid (t?) and the mixture of lauric acid and benzoic acid (t?). Use the formula, ?t = t? - t?.
2. Calculate molality (m), in mol/kg, using the formula, ?t = Kf · m (Kf = 3.9°C-kg/mol for lauric acid).
3. Calculate moles of benzoic acid solute, using the answer in Step 2 (in mol/kg) and the mass (in kg) of lauric acid solvent.
4. Calculate the experimental molecular weight of benzoic acid, in g/mol. Use the original mass of benzoic acid from your data table, and the moles of benzoic acid you found in the previous step.
5. Determine the accepted molecular weight for benzoic acid from its formula, C?H?COOH.
6. Calculate the percent error.

PROCESSING THE DATA
1. Determine the difference in freezing temperatures, ?t, between the pure lauric acid (t?) and the mixture of lauric acid and benzoic acid (t?). Use the formula, ?t = t? - t?.
2. Calculate molality (m), in mol/kg, using the formula, ?t = Kf · m (Kf = 3.9°C-kg/mol for lauric acid).
3. Calculate moles of benzoic acid solute, using the answer in Step 2 (in mol/kg) and the mass (in kg) of lauric acid solvent.
4. Calculate the experimental molecular weight of benzoic acid, in g/mol. Use the original mass of benzoic acid from your data table, and the moles of benzoic acid you found in the previous step.
5. Determine the accepted molecular weight for benzoic acid from its formula, C?H?COOH.
6. Calculate the percent error.

Added by Courtney J.

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