What is the freezing point of lauric acid?
freezing point of pure lauric acid is 44.1 degrees celcius. freezing point of benzoic/lauric acid mixture is 36.6 degrees celcius. The molal freezing point depression constant of lauric acid has been determined Kf=3.9 degrrees celcius.
What is the molar mass of benzoic acid and lauric acid?
Molar mass of benzoic acid (expected value) 6. Molar mass percent difference There is 7.08 grams of lauric acid in the mixture and 1.71 grams of benzoic acid in the mixture. freezing point of benzoic/lauric acid mixture is 36.6 degrees celcius The molal freezing point depression constant of lauric acid has been determined Kf=3.9 degrrees celcius.
Is lauric acid a solid liquid or gas?
Lauric acid is a solid at room temperature but melts easily in boiling water, so liquid lauric acid can be treated with various solutes and used to determine their molecular masses. dodecanoic acid Computed by LexiChem 2.6.6 (PubChem release 2019.06.18)
Does lauric acid affect the pharmacokinetics of phenazepam transdermal therapeutic system?
Study of the pharmacokinetics of phenazepam transdermal therapeutic system showed its higher bioavailability in the presence of lauric acid (f=0.9).
What is the constant in freezing point depression?
The molal freezing point depression constant for H2O, Kf , is given as 1.86 °C.kg/mole.
How do you calculate the freezing point of lauric acid?
Use the formula, ∆t = t1 – t2. 2. Calculate molality (m), in mol/kg, using the formula, ∆t = Kf • m (Kf = 3.9°C-kg/mol for lauric acid)....Mass of lauric acidgFreezing temperature of pure lauric acid°CFreezing point of the benzoic acid–lauric acid mixture°C1 more row
What is the freezing point of lauric acid and benzoic acid?
A mixture containing 3.0 g of Lauric Acid and 0.5 g of Benzoic Acid has a freezing point of 36.6 C. I calculated the freezing point depression as 7.5 C. I calculated the molality of the Benzoic and Lauric Acid as 1.92 mol/kg.
What is the freezing point depression constant of stearic acid?
Stearic acid, CH3(CH2)16COOH, is also known as n-octadecanoic acid and has a freezing point of 69.0◦C and a kf of 4.5◦C/m.
How do you calculate freezing point depression experimentally?
1:1612:16MJC Chemistry Lab: Freezing Point Depression - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo water freezes at zero Celsius when it's just water if you add some salt it freezes at some lowerMoreSo water freezes at zero Celsius when it's just water if you add some salt it freezes at some lower temperature. Negative one negative two something like that depends on how much salt to put in it.
What is the freezing point depression of benzoic acid?
The depression in freezing point of a 0.1 molal solution of benzoic acid in benzene is 0.256K.
What is depression in freezing point How is molecular weight?
Freezing point depression is a colligative property observed in solutions that results from the introduction of solute molecules to a solvent. The freezing points of solutions are all lower than that of the pure solvent and is directly proportional to the molality of the solute. ΔTf=Tf(solvent)−Tf(solution)=Kf×m.
What is the specific heat of lauric acid?
2.15C12:0 Lauric acid (Dodecanoic)CAS number143-07-7Density D4t (°C)0.8690 (50)Viscosity mPa·s (°C)7.30 (50), 2.98 (90)Refractive Index nDt (°C)1.4304 (50)Specific Heat J/g (°C)2.15 (48/78)6 more rows
What is the boiling point of lauric acid?
570°F (298.9°C)Lauric acid / Boiling point
How do you find the freezing point constant?
Strategy:Step 1: Calculate the freezing point depression of benzene. Tf = (Freezing point of pure solvent) - (Freezing point of solution) ... Step 2 : Calculate the molal concentration of the solution. molality = moles of solute / kg of solvent. ... Step 3: Calculate Kf of the solution. Tf = (Kf) (m)
Is freezing point depression in Kelvin?
A solution will solidfy (freeze) at a lower temperature than the pure solvent. This is the colligative property called freezing point depression. Δt is the temperature change from the pure solvent's freezing point to the freezing point of the solution....Freezing Point Depression.SubstanceKfcarbon tetrachloride30.ethyl ether1.79water1.862 more rows
What is the freezing point depression constant of benzene?
5.12 oC/molalThe freezing point of pure benzene is 5.48 oC. The molal freezing point depression constant of benzene is 5.12 oC/molal.
How do you calculate the freezing point of a solution?
Strategy:Step 1: Calculate the freezing point depression of benzene. Tf = (Freezing point of pure solvent) - (Freezing point of solution) ... Step 2 : Calculate the molal concentration of the solution. molality = moles of solute / kg of solvent. ... Step 3: Calculate Kf of the solution. Tf = (Kf) (m)
How do you determine freezing point?
Insert the thermometer in the slush, before the one you're measuring turns completely liquid. Leave the thermometer in there until the point when it becomes all liquid. Write down the temperature when that happens. Make sure the thermometer you are using reads below 0 degree C.
How do you find theoretical freezing point?
The freezing point depression ∆T = KF·m where KF is the molal freezing point depression constant and m is the molality of the solute.
How should the freezing point temperature of lauric acid compare to the melting point temperature of lauric acid?
The melting point of lauric acid is 44 °C. Applications, Question 4). 2. The freezing point of lauric acid is 44 °C, based on the plateau observed at this temperature on the graph.