how would the calculated molar mass change if the following experimental problems were encountered? Explain the...
how would the calculated molar mass change if the following experimental problems were encountered? Explain the reasons for your answer.
a. the unknown was impure and only part of the unknown dissolved in the Lauric acid.
b. your unknown contained a substance that produced two ions per molecule of unknown when dissolved in the Lauric acid.
(experiment on Lauric acid for freezing point depression)
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how would the calculated molar mass change if the following
experimental problems were encountered? Explain the...
How would the calculated molar mass change (increase,decrease, no change) if the following experimental problems were...
How would the calculated molar mass change (increase,decrease, no change) if the following experimental problems were encountered? Explain the reason(s) for your answer. a) The unknown was impure and only part of the unknown dissolved in the lauric acid. b) Your unknown contained a substance which produced two ions per molecule of unknown when dissolved in the lauric acid. c) The unknown was insoluble in lauric acid. d) A very small amount of lauric acid was spilled after weighing, but...
REPORT SHEET EXPERIMENT Freezing Point 19 Depression A. Preparation of experimental apparatus and acid aPreparation of...
REPORT SHEET EXPERIMENT Freezing Point 19 Depression A. Preparation of experimental apparatus and acid aPreparation of experimental apparatus and freezing point determinati freezing point determination of laurie I. Mass of freezing point depression apparatus 2. Mass of freezing point depression apparatus with lauric acid 8n 519 ang 3. Mass of laurie acid used mass acid ana nd arpo B. Freezing point determination of a laurie acid solution 4. Designation of unknown 5. Mass of added unknown, Exp. 3 6. Mass...
Hi, I need some help with Chemistry. Q1: Q2: Here is some background for the questions: Thank y...
Hi, I need some help with Chemistry.
Q1:
Q2:
Here is some background for the questions:
Thank you in advance.
You add 0.0336 moles of benzoic acid solute to 16.00 g of an unknown solvent, which lowers the freezing point of the solvent by 8.6 °C. Calculate the freezing point depression constant (Kf) of the unknown solvent. You dissolve 1.00 g sample of an unknown solute is in 8.00 g of lauric acid, which lowers the freezing point by 5.0...
CHM 112 Determination of Molar Mass by Freezing Point Depression Report Sheet and Data Analysis DATA...
CHM 112 Determination of Molar Mass by Freezing Point Depression Report Sheet and Data Analysis DATA TABLE Mass of lauric acid (g) 8.003 Mass of benzoic acid (g) 1.005 Freezing temperature of pure lauric acid (°C) 42.4 Freezing point of the benzoic acid-lauric acid mixture (°C) 38.7 Discuss possible sources of error in this experiment and how those errors would affect the final calculated molar mass. This is an open ended question and a thorough answer is expected. You should...
No water was added, the only substances in the flask was the lauric acid and the...
No water was added, the only substances in the flask was the
lauric acid and the unknown. we were finding the freezing point.
heated the glass to 60c everything dissolved took it out of hot
bath and recorded temp drop which stopped at 39.44c
Unknown # Identify the unknown: Data: nknen Mass of Lauric Acid 9427 kat Et 31.442 43,2 Freezing Point of Lauric Acid Mass of Unknown .922 Freezing Point of Mixture Results and Discussion: (SHOW WORK FOR CREDIT)...
Molar Mass by Freezing Point Depression con Pre-Laboratory Assignment I. The following data were obtained in...
Molar Mass by Freezing Point Depression con Pre-Laboratory Assignment I. The following data were obtained in an experiment designed to find the molar mass of a solute by freezing point depressio Solvent: para-dichlorobenzene Freezing point ofpure solvent: 53.02"C Mass of unknown substance: 2.04g Freezing point depression constant: 7.1°C/m Mass of para-dichlorobenzene: 24.80 g Freezing point of solution: 50.78 °C a. Determine the freezing point depression, Δ b. Using Equation 4, calculate the molar mass of the unknown substance. .2.au"-7. ↓...
A Molar Mass from freezing-point Depression. 1. Provide definitions for the following terms: a. Solution-cv b....
A Molar Mass from freezing-point Depression. 1. Provide definitions for the following terms: a. Solution-cv b. Solute c. Solvent d. Colligative property e. Freezing-point depression a. What is the objective of this experiment? b. How will that objective be achieved? 3. A 0.2436-g sample of an unknown substances was dissolved in 20.0 mL of cyclohexane. The density of cyclohexane is 0.779 g/mL. The freezing-point depression was 2.5*C. Calculate the molar mass of the unknown substance. 4. What safety rules must...
Freezing Point Depression: Determination of the Molar Mass of an Unknown Substance Laboratory Record Unknown Identifier...
Freezing Point Depression: Determination of the Molar Mass of an Unknown Substance Laboratory Record Unknown Identifier #4 (All unknowns are nonelectrolytes, soi-1) Determination of the freezing point of pure l-butyl alcohol: (Record time-temperature data on the next page) 29.62 1. Mass of empty test tube 2. Mass of test tube and t-butyl alcohol after determination of freezing point of pure t-butyl alcohol 50.25 20.71 3. Mass of t-butyl alcohol Determination of the molar mass of an unknown: (Record time-temperature data...
Date Name Lab Section Partner(s) Determination of Molar Mass by Freezing Point Depression Data: Mass of...
Date Name Lab Section Partner(s) Determination of Molar Mass by Freezing Point Depression Data: Mass of empty test tube 2.2.6! Mass of test tube plus approximately 10.0 g of benzophenone 33.39 The difference is the mass of benzophenone (solvent) 8 kg Mass of unknown (-1.0 g) 1:09: 48.50°c 42.08. Freezing point of pure benzophenone Freezing point of benzophenone containing the unknown The difference is A fp CO Calculations: (Show set-up with cancellation of units) 1. molality of solution 2. moles...
for question 1 the molar mass of unknown is 102g/mol hation by Freezing Point Depression Vernier...
for
question 1 the molar mass of unknown is 102g/mol
hation by Freezing Point Depression Vernier Logger Pro for Windows Section Post-Laboratory Questions (Use the space provided and additional paper if necessary. Record your nemerical answers in the boxes provided.) 1. Obtain the correct molar mass of your unknown from your laboratory instructor. Calculate the percent error in the molar mass that you found. Torg/mol percent error, 2. A student determined the freezing point of pure t-butyl alcohol following the...
REPORT SHEET EXPERIMENT Freezing Point 19 Depression A. Preparation of experimental apparatus and acid aPreparation of experimental apparatus and freezing point determinati freezing point determination of laurie I. Mass of freezing point depression apparatus 2. Mass of freezing point depression apparatus with lauric acid 8n 519 ang 3. Mass of laurie acid used mass acid ana nd arpo B. Freezing point determination of a laurie acid solution 4. Designation of unknown 5. Mass of added unknown, Exp. 3 6. Mass...
Hi, I need some help with Chemistry.
Q1:
Q2:
Here is some background for the questions:
Thank you in advance.
You add 0.0336 moles of benzoic acid solute to 16.00 g of an unknown solvent, which lowers the freezing point of the solvent by 8.6 °C. Calculate the freezing point depression constant (Kf) of the unknown solvent. You dissolve 1.00 g sample of an unknown solute is in 8.00 g of lauric acid, which lowers the freezing point by 5.0...
No water was added, the only substances in the flask was the
lauric acid and the unknown. we were finding the freezing point.
heated the glass to 60c everything dissolved took it out of hot
bath and recorded temp drop which stopped at 39.44c
Unknown # Identify the unknown: Data: nknen Mass of Lauric Acid 9427 kat Et 31.442 43,2 Freezing Point of Lauric Acid Mass of Unknown .922 Freezing Point of Mixture Results and Discussion: (SHOW WORK FOR CREDIT)...
Molar Mass by Freezing Point Depression con Pre-Laboratory Assignment I. The following data were obtained in an experiment designed to find the molar mass of a solute by freezing point depressio Solvent: para-dichlorobenzene Freezing point ofpure solvent: 53.02"C Mass of unknown substance: 2.04g Freezing point depression constant: 7.1°C/m Mass of para-dichlorobenzene: 24.80 g Freezing point of solution: 50.78 °C a. Determine the freezing point depression, Δ b. Using Equation 4, calculate the molar mass of the unknown substance. .2.au"-7. ↓...
A Molar Mass from freezing-point Depression. 1. Provide definitions for the following terms: a. Solution-cv b. Solute c. Solvent d. Colligative property e. Freezing-point depression a. What is the objective of this experiment? b. How will that objective be achieved? 3. A 0.2436-g sample of an unknown substances was dissolved in 20.0 mL of cyclohexane. The density of cyclohexane is 0.779 g/mL. The freezing-point depression was 2.5*C. Calculate the molar mass of the unknown substance. 4. What safety rules must...
Freezing Point Depression: Determination of the Molar Mass of an Unknown Substance Laboratory Record Unknown Identifier #4 (All unknowns are nonelectrolytes, soi-1) Determination of the freezing point of pure l-butyl alcohol: (Record time-temperature data on the next page) 29.62 1. Mass of empty test tube 2. Mass of test tube and t-butyl alcohol after determination of freezing point of pure t-butyl alcohol 50.25 20.71 3. Mass of t-butyl alcohol Determination of the molar mass of an unknown: (Record time-temperature data...
Date Name Lab Section Partner(s) Determination of Molar Mass by Freezing Point Depression Data: Mass of empty test tube 2.2.6! Mass of test tube plus approximately 10.0 g of benzophenone 33.39 The difference is the mass of benzophenone (solvent) 8 kg Mass of unknown (-1.0 g) 1:09: 48.50°c 42.08. Freezing point of pure benzophenone Freezing point of benzophenone containing the unknown The difference is A fp CO Calculations: (Show set-up with cancellation of units) 1. molality of solution 2. moles...
for
question 1 the molar mass of unknown is 102g/mol
hation by Freezing Point Depression Vernier Logger Pro for Windows Section Post-Laboratory Questions (Use the space provided and additional paper if necessary. Record your nemerical answers in the boxes provided.) 1. Obtain the correct molar mass of your unknown from your laboratory instructor. Calculate the percent error in the molar mass that you found. Torg/mol percent error, 2. A student determined the freezing point of pure t-butyl alcohol following the...
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