Homework Answers
TRUE , as only pure compound will give desired calculations.
We will consider the whole mass of unknown taken in the calculations of molar mass determining and if that is not pure then that mass isn't the exact mass of our compound and hence for calculation of true molar mass of compound , purity of unknown is must .
As molar mass = mass of unknown/moles .
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9. True or false: the determination of a molar mass of a compound by the titration...
Experiment 12: Standardization of Sodium Hydroxide and the Determination of the Molar Mass of an Acid...
Experiment 12: Standardization of Sodium Hydroxide and the Determination of the Molar Mass of an Acid Data Concentration of standard HCl 0,1043_ M 0.957 Unknown # 3 Standardization of NaOH Initial HCl buret reading: Final HCI buret reading: Total volume of HCl: 0.34_mL 27.48_ml 37.56 ml 47.60_mL 27,14m 37, 22 ml 41, 24 ml Initial NaOH buret reading: Final NaOH buret reading: Total volume of NaOH: 0.42 ml 2.1 ml 35.34 m 45,40 ml 25.68 ml 34,92 mL 44.98mL Titration...
The molar mass of a compound expresses the ratio of mass to moles Part A molar...
The molar mass of a compound expresses the ratio of mass to moles Part A molar mass- _mass in gr tert-Butyl alcohol is a solvent with a Kf of 9.10 °C/m and a freezing point of 25.5 °C. When 0.807 g of an unknown colorless liquid was dissolved in 11.6 g of tert-butyl alcohol, the solution froze at 15.3°C number of moles This quantity can be determined experimentally by accurately measuring the mass of the sample and determining the corresponding...
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...
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...
Please show all work ! Experiment 9 Conductometric Titration and Gravimetric Determination of a Precipitate REPORT...
Please show all work !
Experiment 9 Conductometric Titration and Gravimetric Determination of a Precipitate REPORT SHEET Name: DATA TABLE Trial 1 Trial 2 Trial 3 Equivalence point (mL) 27.l16 mL Mass of filter paper precipitate ()311 I1133 20139 03228 Mass of filter paper (9) Mass of precipitate (g) Molarity of HaSO (M) DATA ANALYSIS (If you need more space, provide your answers on the back page) 1. Use the titration results to calculate the moles of H2SO4 that were...
HELP! Part B: Determination of acid ionization constant (K.) and molar mass of an u Concentration...
HELP!
Part B: Determination of acid ionization constant (K.) and molar mass of an u Concentration of NaOH (mol/L) from bottle: 0.1053 Mass concentration of unknown acid (g/L) from bottle: 3.120 pH of unknown acid solution: 228 from pH meter. 1) Titration of unknown acid using indicator only Trial 2 Trial 1 1.593 30.851 090909 ml Mass of empty beaker Mass of beaker + unknown acid solution Mass of unknown acid solution Volume of unknown acid solution Initial volume of...
The molar mass of CaCO3 is greater than the molar mass of Ca(NO3)2 True or False...
The molar mass of CaCO3 is greater than the molar mass of Ca(NO3)2 True or False True False
9. Write true or false a) Partial molar volume is defined as y = b) The volume of a solution at T...
please kindly help with true or false from a to j.
thank you
9. Write true or false a) Partial molar volume is defined as y = b) The volume of a solution at T and p is equal to the sum of the volumes of its pure components c) The partial molar volume of a components i in a solution must equal the molar volume of the d) The SI units for partial molar volume are m/mol. ni p,T,njsi...
Post-Lab Material Experiment 19 Data and Calculations: Molar Mass Determination by Depression of the Freezing Point...
Post-Lab Material Experiment 19 Data and Calculations: Molar Mass Determination by Depression of the Freezing Point 0.3 Name Section A. Measured Freezing Point of Pure Water B. Finding the Freezing Point of a Solution of Liquid Unknown Target mass of solute (Calculated based on the parameters in the instructions) Unknown # Liquid 3.5 Actual mass of solute used Trial Freezing point of solution (observed) -3.0 Mass of solution 116.6 Trial II Freezing point of solution -3.3 Mass of solution 101.3....
Chemistry: Molar mass determination and freezing point depression. If your unknown solute sample weighed 0.634 grams,...
Chemistry:
Molar mass determination and freezing point depression.
If your unknown solute sample weighed 0.634 grams, but some of it stuck to the test tube wall when you were pouring it in and did not dissolve in the t-butyl alcohol, what sort of error will this cause in the calculated molar mass of your unknown solute? Explain. What would be the freezing point of an aqueous solution that contains 10.3 grams of ethylene glycol [(C_2H_4(OH)_2] in 100 mL of water?
Experiment 12: Standardization of Sodium Hydroxide and the Determination of the Molar Mass of an Acid Data Concentration of standard HCl 0,1043_ M 0.957 Unknown # 3 Standardization of NaOH Initial HCl buret reading: Final HCI buret reading: Total volume of HCl: 0.34_mL 27.48_ml 37.56 ml 47.60_mL 27,14m 37, 22 ml 41, 24 ml Initial NaOH buret reading: Final NaOH buret reading: Total volume of NaOH: 0.42 ml 2.1 ml 35.34 m 45,40 ml 25.68 ml 34,92 mL 44.98mL Titration...
The molar mass of a compound expresses the ratio of mass to moles Part A molar mass- _mass in gr tert-Butyl alcohol is a solvent with a Kf of 9.10 °C/m and a freezing point of 25.5 °C. When 0.807 g of an unknown colorless liquid was dissolved in 11.6 g of tert-butyl alcohol, the solution froze at 15.3°C number of moles This quantity can be determined experimentally by accurately measuring the mass of the sample and determining the corresponding...
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...
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...
Please show all work !
Experiment 9 Conductometric Titration and Gravimetric Determination of a Precipitate REPORT SHEET Name: DATA TABLE Trial 1 Trial 2 Trial 3 Equivalence point (mL) 27.l16 mL Mass of filter paper precipitate ()311 I1133 20139 03228 Mass of filter paper (9) Mass of precipitate (g) Molarity of HaSO (M) DATA ANALYSIS (If you need more space, provide your answers on the back page) 1. Use the titration results to calculate the moles of H2SO4 that were...
HELP!
Part B: Determination of acid ionization constant (K.) and molar mass of an u Concentration of NaOH (mol/L) from bottle: 0.1053 Mass concentration of unknown acid (g/L) from bottle: 3.120 pH of unknown acid solution: 228 from pH meter. 1) Titration of unknown acid using indicator only Trial 2 Trial 1 1.593 30.851 090909 ml Mass of empty beaker Mass of beaker + unknown acid solution Mass of unknown acid solution Volume of unknown acid solution Initial volume of...
The molar mass of CaCO3 is greater than the molar mass of Ca(NO3)2 True or False True False
please kindly help with true or false from a to j.
thank you
9. Write true or false a) Partial molar volume is defined as y = b) The volume of a solution at T and p is equal to the sum of the volumes of its pure components c) The partial molar volume of a components i in a solution must equal the molar volume of the d) The SI units for partial molar volume are m/mol. ni p,T,njsi...
Post-Lab Material Experiment 19 Data and Calculations: Molar Mass Determination by Depression of the Freezing Point 0.3 Name Section A. Measured Freezing Point of Pure Water B. Finding the Freezing Point of a Solution of Liquid Unknown Target mass of solute (Calculated based on the parameters in the instructions) Unknown # Liquid 3.5 Actual mass of solute used Trial Freezing point of solution (observed) -3.0 Mass of solution 116.6 Trial II Freezing point of solution -3.3 Mass of solution 101.3....
Chemistry:
Molar mass determination and freezing point depression.
If your unknown solute sample weighed 0.634 grams, but some of it stuck to the test tube wall when you were pouring it in and did not dissolve in the t-butyl alcohol, what sort of error will this cause in the calculated molar mass of your unknown solute? Explain. What would be the freezing point of an aqueous solution that contains 10.3 grams of ethylene glycol [(C_2H_4(OH)_2] in 100 mL of water?
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