Question

In: Chemistry

The boiling point of ethanol is 78.3oC and the boiling point elevation constant (Kb) is 1.22oC/m....

The boiling point of ethanol is 78.3oC and the boiling point elevation constant (Kb) is 1.22oC/m. The freezing point for ethanol is -114.1oC and the freezing point depression constant (Kf) is 1.99oC/m. 87.8 g of the dye crystal violet (molar mass = 407.98 g/mol) is dissolved in 500.0 g of pure ethanol.

a.) What is the new boiling point of the resulting crystal violet solution?

b.) What is the new freezing point of the resulting crystal violet solution?

Solutions

Expert Solution


Related Solutions

12.) Boiling point elevation- Given that the Kb for water is 0.51° C/m, calculate the boiling...
12.) Boiling point elevation- Given that the Kb for water is 0.51° C/m, calculate the boiling point of a solution containing 71.0 g of Na2SO4 dissolved in 350 g of water.
The boiling point elevation constant for water is 0.51 degrees C/m. What is the boiling point...
The boiling point elevation constant for water is 0.51 degrees C/m. What is the boiling point of a solution made by dissolving 21.6g of a non-ionizing solute with a molar mass of 103.5 g/mol in 187g of water?
Context: Performed boiling point elevation lab to determine molar mass of solute dissolved in pure ethanol...
Context: Performed boiling point elevation lab to determine molar mass of solute dissolved in pure ethanol (solute was urea): Question: In regards to intermolecular forces, why is is the assumption that the solute is a nonelectrolyte valid here? What types of intermolecular fires are present in the solvent? For what types of solutes and in which solvent would the van't Hoff factor be larger than 1? The only one that I think I know is the last part - electrolytes...
The formula that governs the depression of freezing point and elevation of boiling point for a...
The formula that governs the depression of freezing point and elevation of boiling point for a solution consisting of a solute dissolved in a solvent is: ΔT = i × kb × m where: ΔT = the temperature change between a pure solvent and its solution i = the number of species per mole of solute that are dissolved in the solvent (e.g., i = 1 for a non-ionic solute that does not break apart into ions; i = 2...
Ethanol has a normal boiling point of 78.3 degrees celcius. Why is the normal boiling point...
Ethanol has a normal boiling point of 78.3 degrees celcius. Why is the normal boiling point higher than methanol but lower than iso-propanol (Normal boiling point = 82.3, heat of vaporization = 45.4)? Would you expect the heat of vaporization of ethanol to follow the same trend? Explain. AND Calculate the heat of vaporixation of cyclohexane using the normal boiling point of 80.7 degrees celcius. The vapor pressure of cyclohexane at 25.0 degrees celcius is 0.132 atm.
1. Which of these aqueous solutions has the highest boiling point? [Kb= 0.512] (a) 1.25 M...
1. Which of these aqueous solutions has the highest boiling point? [Kb= 0.512] (a) 1.25 M C6H12O6 (b) 1.25 M KNO3 (c) 1.25 M Ca(NO3)2 (d) they all have the same boiling point 2. Which of these aqueous solutions has the highest boiling point? [Kb= 0.512] (a) 1.25 M C6H12O6 (b) 1.25 M KNO3 (c) 1.25 M Ca(NO3)2 (d) they all have the same boiling point 3. A solution contains a mixture of substance A and substance B, both of...
The boiling point constant for water is 0.51 Kkg/mol. Calculate boiling point of water in a...
The boiling point constant for water is 0.51 Kkg/mol. Calculate boiling point of water in a solution gf 0.010 mol/kg of sugar and a solution of 0.010 mol/kg of NaCl.
Part A - Calculation of Boiling-Point Elevation and Freezing-Point Depression Which aqueous solution will have the...
Part A - Calculation of Boiling-Point Elevation and Freezing-Point Depression Which aqueous solution will have the lowest freezing point? Which aqueous solution will have the lowest freezing point? a) 0.10 m HCl b) 0.15 m NaCl c) 0.050 m CaCl2 d) 0.20 m C12H22O11 e) 0.050 m CH3COOH
The normal boiling point for acetone is 56.5°C. At an elevation of 5700 ft, the atmospheric...
The normal boiling point for acetone is 56.5°C. At an elevation of 5700 ft, the atmospheric pressure is 623 torr. What would be the boiling point of acetone (ΔHvap = 32.0 kJ/mol) at this elevation? _____ °C What would be the vapor pressure of acetone at 25.0°C at this elevation? _____ torr
Ethanol has a heat of vaporization of 38.56kJ/mol and a normal boiling point of 78.4 ℃
Ethanol has a heat of vaporization of 38.56kJ/mol and a normal boiling point of 78.4 ℃ . What is the vapor pressure of ethanol at 17 ℃? Express your answer using two significant figures. Units in torr
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT