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11 Nov 2019
4. b. Complete the following table and show Record all calculated data to the correct number of significant figures. the calculations for the determinations for Trial 1 (see Calculation Zone 1. Mass of dry, solid acid (g) 2. Molar concentration of NaOH(mOU/L) 3. Buret reading of NaOH, initial (mL) 4. Buret reading of NaOH at Date -0150- 0.00 Sampl stoichiometric point, final (mL) 5. Volume of NaOH dispensed at Part & stoichiometric point (mL, from graph) Moles of NaOH to the 7. stoichiometric point (mol) Show calculation. 8. Moles of acid (mol) 9. Molar mass of acid (g/mol) 11. Volume of NaOH halfway Show calculation. Part 9 to the stoichiometric point (mL, from graph) 12. pK, of weak acid (from graph) 5. b. For Trials 2 and 3, the molar mass of the weak acid was determined to be 123 g/mol and 121 g/mol respectively. a. What is the average molar mass of the weak acid? b. what are the standard deviation and the relative standard deviation (%RSD) for the molar mass data of the weak acid?
4. b. Complete the following table and show Record all calculated data to the correct number of significant figures. the calculations for the determinations for Trial 1 (see Calculation Zone 1. Mass of dry, solid acid (g) 2. Molar concentration of NaOH(mOU/L) 3. Buret reading of NaOH, initial (mL) 4. Buret reading of NaOH at Date -0150- 0.00 Sampl stoichiometric point, final (mL) 5. Volume of NaOH dispensed at Part & stoichiometric point (mL, from graph) Moles of NaOH to the 7. stoichiometric point (mol) Show calculation. 8. Moles of acid (mol) 9. Molar mass of acid (g/mol) 11. Volume of NaOH halfway Show calculation. Part 9 to the stoichiometric point (mL, from graph) 12. pK, of weak acid (from graph) 5. b. For Trials 2 and 3, the molar mass of the weak acid was determined to be 123 g/mol and 121 g/mol respectively. a. What is the average molar mass of the weak acid? b. what are the standard deviation and the relative standard deviation (%RSD) for the molar mass data of the weak acid?
Jean KeelingLv2
11 Nov 2019