1.The presence of a dissolved nonvolatile solute in a solution causes the freezing point to be...
1.The presence of a dissolved nonvolatile solute in a solution causes the freezing point to be _____________ (raised, lowered) compared to that of the pure solvent. The change in freezing point of the solvent can be calculated using the equation:
2.The presence of a dissolved nonvolatile solute in a solution causes the boiling point to be _____________ (raised, lowered) compared to that of the pure solvent.
The change in boiling point of the solvent can be calculated using the equation:
3.
For strong electrolytes, i = number of _________________________ per mole of solute dissolved.
CaCl2 dissolves yielding three ions, one Ca+2 ion and two Cl- ions, thus i = _____
(NH4)3P dissolves yielding four ions, three NH4+ ions and one P-3 ion, thus i = _____
Homework Answers
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1.The presence of a dissolved nonvolatile solute in a solution
causes the freezing point to be...
Enter your answer in the provided box. The formula that governs the depression of freezing point...
Enter your answer in the provided box. 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: where:AT = 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 for...
Enter your answer in the provided box. The formula that governs the depression of freezing point...
Enter your answer in the provided box. 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: AT = i x kb x m where: AT = 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 nonionic solute that does not...
A nonvolatile, non-dissociating solute was dissolved in 12.0 g of benzene (C6H6). The freezing point of...
A nonvolatile, non-dissociating solute was dissolved in 12.0 g of benzene (C6H6). The freezing point of the solution was measured as 1.3 °C, while pure benzene freezes at 5.5 °C. If pure benzene has a vapor pressure of 75 torr, what is the vapor pressure of this solution. For benzene, Kf = 5.12 °C/m and Kb = 2.53 °C/m.
The freezing point of benzene C6H6 is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene i...
The freezing point of benzene C6H6 is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is testosterone . How many grams of testosterone, C19H28O2 (288.4 g/mol), must be dissolved in 243.0 grams of benzene to reduce the freezing point by 0.500°C ? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether...
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in...
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 717.0 torr at 64.7°C. What is the mole fraction of methanol in this solution?
What would be the purpose of this lab based on the following information? Colligative Properties II...
What would be the purpose of this lab based on the following information? Colligative Properties II Colligative Property is a property of a solution that depends only on the number of solute molecule present. Osmotic pressure, freezing point depression, boiling point elevation, and vapor pressure lowering are all colligative properties. In today’s lab we will look at three of these properties. Electrolytes are substances that forms ions in solution that conduct electricity. Electrolytes can either be an acid, base or...
Data were collected to determine the molar mass of a nonvolatile solid solute dissolved in cyclohexane....
Data were collected to determine the molar mass of a nonvolatile solid solute dissolved in cyclohexane. Complete the table for the analysis. Record calculated values with the correct number of significant figures. Show detailed calculations to the right of the table. Volume of cyclohexane (mL): 15.5 Mass of cyclohexane (kg): _________ Mass of added solute (g): 0.1660 Kf for cyclohexane (˚C/m): 20.0 Freezing point change, ΔTf (˚C): 2.20 Moles of solute (mol): _________ Molar mass of solute (g/mol):__________
The freezing point of benzene, C6H6, is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves...
The freezing point of benzene, C6H6, is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is DDT . A student dissolves 14.18 grams of DDT, C14H9Cl5 (354.5 g/mol), in 159.0 grams of benzene. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution...
Which of the following regarding colligative properties of a solution is NOT correct? a. The temperature...
Which of the following regarding colligative properties of a solution is NOT correct? a. The temperature range over which a solution remains liquid is larger than that of the pure solvent due to the presence of solute particles. Cb. Vapor pressure reduction is a colligative property. c. Colligative properties depend on the concentration of the particles dissolved in the solvent. Cd. The freezing point of a solution increases as the concentration of solute increases. e. The change in the boiling...
solve please. Enter your answer in the provided box. The formula that governs the depression of...
solve please.
Enter your answer in the provided box. 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: AT=ix ky Xm Book where: AT = the temperature change between a pure solvent and its solution erences 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...
Enter your answer in the provided box. 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: where:AT = 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 for...
Enter your answer in the provided box. 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: AT = i x kb x m where: AT = 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 nonionic solute that does not...
Which of the following regarding colligative properties of a solution is NOT correct? a. The temperature range over which a solution remains liquid is larger than that of the pure solvent due to the presence of solute particles. Cb. Vapor pressure reduction is a colligative property. c. Colligative properties depend on the concentration of the particles dissolved in the solvent. Cd. The freezing point of a solution increases as the concentration of solute increases. e. The change in the boiling...
solve please.
Enter your answer in the provided box. 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: AT=ix ky Xm Book where: AT = the temperature change between a pure solvent and its solution erences 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...
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