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Freezing Point of pure TBA (experimentally determined) = 22.90 °C. (C)(kg solvent) mol solute Molal Freezing Point Depression Constant Data - Freezing Point with 1" addition of Solute Time min'sec" Temperature Time min'sec" Temperature (decimal) (°C) (decimal) (°C) 0'00" (0.00) 37.00 0'15" (0.25) 31.40 0'30" (0.50) 27.50 0'45" (0.75) 23.80 1'00" (1.00) 21.00 1'15" (1.25) 18.80 1'30" (1.50) 16.60 Freezing Point Data A Time (min) Temp (C) 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 23.80 21.00 18.80 16.60 37.00 Freesing Point Duta B 31.40 Time (min) Temp (C) 27.50 0.50 m1 -13.271 bl 35.111 Intersection Temp 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 m2 5.50 6.00 -1.35 b2 17.75 15.79 "C 3'00" (3.00) 13.70 3'30" (3.50) 13.00 4'00" (4.00) 12.20 4'30" (4.50) 11.60 15.50 15.00 14.50 13.70 13.00 12.20 11.60 11.00 10.40 9.80 1'45" (1.75) 15.50 2'00" (2.00) 15.00 2'30" (2.50) 14.50 2 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 ТВА' k,= 1.00 y=-13.271x 35.311 a) What is the freezing point of the solution? b) What is the molar mass of the unknown? 8,09 Freezing Point Determination Temperature (°C) vs Time (min) 2.00 Time min'sec" Temperature (decimal) (°C) 1.00 5'00" (5.00) 11.00 5'30" (5.50) 10.40 6'00" (6.00) 9.80 4.00 Time (min) y=-1.3457x+17,75 5.00 6.00 7.00

Freezing Point of pure TBA (experimentally determined) = 22.90 °C. (C)(kg solvent) mol solute Molal Freezing Point Depression Constant Data - Freezing Point with 1" addition of Solute Time min'sec" Temperature Time min'sec" Temperature (decimal) (°C) (decimal) (°C) 0'00" (0.00) 37.00 0'15" (0.25) 31.40 0'30" (0.50) 27.50 0'45" (0.75) 23.80 1'00" (1.00) 21.00 1'15" (1.25) 18.80 1'30" (1.50) 16.60 Freezing Point Data A Time (min) Temp (C) 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 23.80 21.00 18.80 16.60 37.00 Freesing Point Duta B 31.40 Time (min) Temp (C) 27.50 0.50 m1 -13.271 bl 35.111 Intersection Temp 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 m2 5.50 6.00 -1.35 b2 17.75 15.79 "C 3'00" (3.00) 13.70 3'30" (3.50) 13.00 4'00" (4.00) 12.20 4'30" (4.50) 11.60 15.50 15.00 14.50 13.70 13.00 12.20 11.60 11.00 10.40 9.80 1'45" (1.75) 15.50 2'00" (2.00) 15.00 2'30" (2.50) 14.50 2 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 ТВА' k,= 1.00 y=-13.271x 35.311 a) What is the freezing point of the solution? b) What is the molar mass of the unknown? 8,09 Freezing Point Determination Temperature (°C) vs Time (min) 2.00 Time min'sec" Temperature (decimal) (°C) 1.00 5'00" (5.00) 11.00 5'30" (5.50) 10.40 6'00" (6.00) 9.80 4.00 Time (min) y=-1.3457x+17,75 5.00 6.00 7.00

Fundamentals Of Analytical Chemistry
Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.12QAP
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PRE-LAB QUESTIONS 1. The following experimental data were collected and graphed: Mass of pure TBA used = 15.348 g 1.081 g Mass of FIRST Sample in TBA=
Transcribed Image Text:PRE-LAB QUESTIONS 1. The following experimental data were collected and graphed: Mass of pure TBA used = 15.348 g 1.081 g Mass of FIRST Sample in TBA=
Freezing Point of pure TBA (experimentally determined) = 22.90 °C. (C)(kg solvent) mol solute Molal Freezing Point Depression Constant. 0'00" (0.00) 37.00 0'15" (0.25) 31.40 0'30" (0.50) 27.50 0'45" (0.75) 23.80 1'00" (1.00) 21.00 1'15" (1.25) 18.80 1'30" (1.50) 16.60 Data- Freezing Point with 1" addition of Solute Time min'sec" Temperature Time min'sec" Temperature Time min'sec" Temperature (decimal) (°C) (decimal) (°C) (decimal) (°C) Freezing Point Data A Time (min) Temp (C) 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 37.00 Freezing Point Data B 31.40 Time (min) Temp (C) 27.50 0.50 23.80 0.75 21.00 1.00 18.80 1.25 16.60 1.50 1.75 m1 -13.271 bl 35.111 Intersection Temp. 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 m2 -1.35 b2 17.75 15.79 °C 15.50 15.00 14.50 13.70 13.00 12.20 11.60 11.00 10.40 9.80 1'45" (1.75) 15.50 2'00" (2.00) 15.00 2'30" (2.50) 14.50 3'00" (3.00) 13.70 3'30" (3.50) 13.00 4'00" (4.00) 12.20 4'30" (4.50) 11.60 E 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 TBA: K 1.00 y=-13.271x + 35.311 a) What is the freezing point of the solution? b) What is the molar mass of the unknown? 8,09 Freezing Point Determination Temperature (°C) vs Time (min) 2.00 5'00" (5.00) 11.00 5'30" (5.50) 10.40 6'00" (6.00) 9.80 3.00 Time (min) y=-1.3457x + 17,75 5.00 6.00 7.00 201
Transcribed Image Text:Freezing Point of pure TBA (experimentally determined) = 22.90 °C. (C)(kg solvent) mol solute Molal Freezing Point Depression Constant. 0'00" (0.00) 37.00 0'15" (0.25) 31.40 0'30" (0.50) 27.50 0'45" (0.75) 23.80 1'00" (1.00) 21.00 1'15" (1.25) 18.80 1'30" (1.50) 16.60 Data- Freezing Point with 1" addition of Solute Time min'sec" Temperature Time min'sec" Temperature Time min'sec" Temperature (decimal) (°C) (decimal) (°C) (decimal) (°C) Freezing Point Data A Time (min) Temp (C) 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 37.00 Freezing Point Data B 31.40 Time (min) Temp (C) 27.50 0.50 23.80 0.75 21.00 1.00 18.80 1.25 16.60 1.50 1.75 m1 -13.271 bl 35.111 Intersection Temp. 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 m2 -1.35 b2 17.75 15.79 °C 15.50 15.00 14.50 13.70 13.00 12.20 11.60 11.00 10.40 9.80 1'45" (1.75) 15.50 2'00" (2.00) 15.00 2'30" (2.50) 14.50 3'00" (3.00) 13.70 3'30" (3.50) 13.00 4'00" (4.00) 12.20 4'30" (4.50) 11.60 E 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 TBA: K 1.00 y=-13.271x + 35.311 a) What is the freezing point of the solution? b) What is the molar mass of the unknown? 8,09 Freezing Point Determination Temperature (°C) vs Time (min) 2.00 5'00" (5.00) 11.00 5'30" (5.50) 10.40 6'00" (6.00) 9.80 3.00 Time (min) y=-1.3457x + 17,75 5.00 6.00 7.00 201
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