Determine the freezing point of a 0.966 molal solution of ethanol. The normal freezing point of...
Determine the freezing point of a 0.966 molal solution of ethanol. The normal freezing point of ethanol is -114.6oC and has Kf = 1.99 oC/m. Answer to 1 decimal place. Units are not required.
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Determine the freezing point of a 0.966 molal solution of
ethanol. The normal freezing point of...
Molal Boiling-Point-Elevation and Freezing-Point-Depression Solvent Normal Boiling Point (∘C) Kb (∘C/m) Normal Freezing Point (∘C) Kf...
Molal Boiling-Point-Elevation and Freezing-Point-Depression Solvent Normal Boiling Point (∘C) Kb (∘C/m) Normal Freezing Point (∘C) Kf (∘C/m) Water, H2O 100.0 0.51 0.0 1.86 Benzene, C6H6 80.1 2.53 5.5 5.12 Ethanol, C2H5OH 78.4 1.22 -114.6 1.99 Carbon tetrachloride, CCl4 76.8 5.02 -22.3 29.8 Chloroform, CHCl3 61.2 3.63 -63.5 4.68 Part E freezing point of 2.02 g KBr and 4.84 g glucose (C6H12O6) in 187 g of water Part F boiling point of 2.02 g KBr and 4.84 g glucose (C6H12O6) in...
Given the following information. Determine the freezing points of a solution which contains 76.5 g of a sodium carbonate (Na2CO3) in 500.0 g of ethanol (C2H6O). Kf for ethanol ...
Given the following information. Determine the freezing points of a solution which contains 76.5 g of a sodium carbonate (Na2CO3) in 500.0 g of ethanol (C2H6O). Kf for ethanol 1.99 °C / m Normal freezing point for ethanol -114.6 °C
A certain substance X has a normal freezing point of 6.8 C and a molal freezing...
A certain substance X has a normal freezing point of 6.8 C and a molal freezing point depression constant Kf=7.51C kg x mol-1 . A solution is prepared by dissolving some urea ((NH2)2CO) in 600 of X. This solution freezes at 5.0 C . Calculate the mass of urea that was dissolved. Be sure your answer has the correct number of significant digits.
When 12.6-grams of an unknown compound is placed in 0.116-kg of benzene, the freezing point is...
When 12.6-grams of an unknown compound is placed in 0.116-kg of benzene, the freezing point is changed by 2.34°C. The value of Kf= 4.90°C/m for benzene. Determine the molar mass of the unknown compound. Answer to 1 decimal place and include your units. Answer: Determine the molality of a solution when 32.3 grams of ethanol, C2H5OH (Molar mass = 46.08 g/mol) is dissolved in 0.947 kg of water. Answer to 2 decimal places. Answer: Find the freezing point of a...
A solution is prepared by dissolving 2.00 g of glycerin (C3H8O3) in 201 g of ethanol...
A solution is prepared by dissolving 2.00 g of glycerin (C3H8O3) in 201 g of ethanol (C2H5OH). The freezing point of the solution is _______ degrees celsius. The freezing point of pure ethanol is -114.6 degrees celsius at 1atm. The molal-freezing point depression constant (Kf) for ethanol is 1.99 degrees celsius/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively.
QUESTION 11 Determine the molal concentration of a sugar solution in water that has a freezing...
QUESTION 11 Determine the molal concentration of a sugar solution in water that has a freezing point of-2.1°C. Kf 1.86°C/m for water Oa.-1.13 m b.-3.91 m c. 1.13 m d. 0.113 m e. 3.91 m
Determine the freezing point of a solution that contains 29.5 g of iodine dissolved in 109...
Determine the freezing point of a solution that contains 29.5 g of iodine dissolved in 109 mL of ethanol (d = 0.789 g/mL). Pure ethanol has a melting point of -114.0 degree C and a freezing point depression constant of -1.99 degree C/m.
8. Which aqueous solution will have the lowest freezing point? A) 0.60 molal sucrose B) 0.50...
8. Which aqueous solution will have the lowest freezing point? A) 0.60 molal sucrose B) 0.50 molal KF C) 0.60 molal glucose D) 0.24 molal Fel3 9, If "A" contains 2% NaCl and is separated by a semipermeable membrane occur? A) NaCI will flow from "A" to "B". B) NaCI will flow from "B" to "A". C) Water will flow from "A" to "B". D) Water will flow from "B" to "A". E) none of the above from "B which...
The freezing point of ethanol, CH3CH2OH, is -117.300 °C at 1 atmosphere. Kf(ethanol) = 1.99 °C/m...
The freezing point of ethanol, CH3CH2OH, is -117.300 °C at 1 atmosphere. Kf(ethanol) = 1.99 °C/m In a laboratory experiment, students synthesized a new compound and found that when 12.98 grams of the compound were dissolved in 255.2 grams of ethanol, the solution began to freeze at -117.651 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound? ------- g/mol
A solution is prepared by dissolving 5.00 g of glycerin () in 201 g of ethanol The...
A solution is prepared by dissolving 5.00 g of glycerin () in 201 g of ethanol The freezing point of the solution is ________°C. The freezing point of pure ethanol is -114.6 °C at 1 atm. The molal-freezing-point-depression constant () for ethanol is 1.99 °C/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively. -115.1 -119.4 0.537 -109.8 -114.1
When 12.6-grams of an unknown compound is placed in 0.116-kg of benzene, the freezing point is changed by 2.34°C. The value of Kf= 4.90°C/m for benzene. Determine the molar mass of the unknown compound. Answer to 1 decimal place and include your units. Answer: Determine the molality of a solution when 32.3 grams of ethanol, C2H5OH (Molar mass = 46.08 g/mol) is dissolved in 0.947 kg of water. Answer to 2 decimal places. Answer: Find the freezing point of a...
QUESTION 11 Determine the molal concentration of a sugar solution in water that has a freezing point of-2.1°C. Kf 1.86°C/m for water Oa.-1.13 m b.-3.91 m c. 1.13 m d. 0.113 m e. 3.91 m
Determine the freezing point of a solution that contains 29.5 g of iodine dissolved in 109 mL of ethanol (d = 0.789 g/mL). Pure ethanol has a melting point of -114.0 degree C and a freezing point depression constant of -1.99 degree C/m.
8. Which aqueous solution will have the lowest freezing point? A) 0.60 molal sucrose B) 0.50 molal KF C) 0.60 molal glucose D) 0.24 molal Fel3 9, If "A" contains 2% NaCl and is separated by a semipermeable membrane occur? A) NaCI will flow from "A" to "B". B) NaCI will flow from "B" to "A". C) Water will flow from "A" to "B". D) Water will flow from "B" to "A". E) none of the above from "B which...
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