9. A solution of 1,035 g of benzoic acid in 8.525 g of lauric acid had...
6) A solution made by dissolving 1.083 g of benzoic acid (CyH6O2) in 8.242 g of lauric acid. (benzoic acid MM =122.13 g/mol; lauric acid FP = 43.2°C: K= 3.87°C kg/mol a) What is the mass percent of benzoic acid? b) What is the molality of the solution? c) What is the freezing point of the solution?
DATA TABLE Mass of lauric acid (9) 8.25 1.09 42.22 C Mass of benzoic acid (g) Freezing temperature of pure lauric acid ('C) Freezing point of the benzoic acid-lauric acid mixture (C)39,11°c Going Further Questions: 1. Calculate molality (m), in molkg, using the formula AT- Kx m. The K value for lauric acid is 3.9°c-kg/mol. 2. Calculate moles of benzoic acid solute, using the molality and the mass (in kg) of lauric acid solvent. 3. Calculate the experimental molecular weight...
DATA AND CALCULATIONS Mass of lauric acid Mass of benzoic acid Freezing temperature of pure lauric acid Freezing point of the benzoic acid-lauric acid mixture Freezing temperature depression, At 38-1c Molality, m molkg Moles of benzoic acid mol Molecular weight of benzoic acid (experimental) g/mo Molecular weight of benzoic acid (accepted) g/mol Percent error
mass of lauric acid = 8.001g mass of benzoic acid = 1.001g freezing temperature of pure lauric acid = 43.3 c freezing point of the benzoic acid- lauric acid mix = 38.3 c 1- calculate the molality(m), in mol/kg, using the formula delta(t) = Kf * m. the Kf value for lauric acid is 3.9 C*Kg/mol 2- Calculate moles of benzoic acid solute, using the molality and the mass in (kg) of lauric acid solvent. 3- calculate the experimental molecular...
Mass of lauric acid= 8.0021g Mass of unknown solute= 1.0036g Freexing temperature of pur lauric acid=42.62 Freezing temperature point of the unknown solute and lauric acid =36.09 Calculate mole of benzoic acid solute, using the molality and the mass of lauric acid solvent Calculate the experimental molar mass of benzoic acid , in g/mol
A TARLES ca Part I: Benzoic acid and laurie Acid Mass of uric acid grams) Mass of benzoic acid grams) Freezing temperature of pure lauric acid (°C) From Part 8.02 11.04 g. 4 2.95 4 227900 Freezing point of the benzoic acid and lauricucid ("C) Part III: Unknown solute and lauric Acid Mass of lauric acid (grams) 8.0 49 Mass of unknown solute (grams) P.98g Freezing temperature of pure lauric acid ("C) (From Part 45°C Freezing point of the unknown...
The freezing point of pure lauric acid was measured. Then the freezing point of a solution of 4.003 g of lauric acid with 0.399g of unknown was measured. Determine the molar mass of the unknown. Kf for lauric acid = 4.4 °C/m. Freezing point of Lauric acid =44°C Freezing point of Unknown= 39°C
Find the freezing point depression of pure lauric acid-unknown solution. Find the molality of the unknown. Info: Kf= 4.40*C/moles solute Freezing point of pure lauric acid- 43.2*C and freezing point of solution- 42 *C Mass of unknown solid (nonelectrolyte)- 0.0612g, mass of lauric acid- 3.9321g
(V) (8 points) What is the freezing point temperature for a solution of 1.221 g of benzoic acid (C&HsCOOH) in 3 8.000 g of lauric acid? For lauric acid, CHs(CH2)1oCOOH, the normal freezing point is 43.2°C, and Kr value is 3.9 °C/m. 5
A 2.00 g samples of benzoic acid (mw = 122.2 amu) is dissolved in 50.0 g of lauric acid acid, which has a normal melting point of 45.0 oC. If the new solution has a depressed freezing point of 43.7 oC, what is the freezing point depression constant for lauric acid? A.0.251 oC/m B.3.97 oC/m * C.3.25 oC/m D.0.307 oC/m E.None of the above