Determining the Molar Mass of an Unknown Solute by Freezing Point Depression Introduction: Colligative properties of solutions are only influenced by the concentration of solute particles and are independent of the nature of the solute. Some examples of colligative properties are boiling point elevation‚ vapor pressure lowering‚ and freezing point lowering (depression) (Brown‚ 542). For a substance to freeze‚ the kinetic energy of the particles must be low enough for the
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I) Target Market 1) Haagen-Dazs Haagen-Dazs is taking the “excellent ice cream” line; the aim target consumers are the youngers who are fashionable and in the income pyramid peak. (yc2000‚ 2008) 2) Baskin-Robbins The primary target market of Baskin Robbins is comprised of higher middle (Rs. 150 000 to 200 000) and higher upper (Rs. 200 000 above) income professionals and families with toddlers. The secondary segment of Baskin Robbins target market is composed of teenagers
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Organizational Approaches to Change The ability to change and adapt is extremely important for any organization to reach its full potential. Influencing people to change is more dependent on showing them a truth that influences their feelings‚ rather than shifting their thinking (Kotter & Cohen‚ 2002‚ p. 1). If leaders can change the behavior of members of an organization‚ the successful large-scale change they are seeking will more likely be realized. According to Kotter and Cohen‚ in order to
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colligative properties are: freezing point of depression‚ boiling point elevation‚ vapor pressure lowering‚ and osmotic pressure.1 Colligative properties are present in everyday life‚ such as adding salt to a boiling pot of water. By adding salt to the water‚ the boiling point of elevation is raised and the boiling salt water will have a higher temperature compared to the temperature of boiling pure water.2 The colligative property that will be used in this experiment is the freezing point of depression
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experiment will be the freezing point depression as an example of a colligative property. Every liquid has a freezing point: the temperature at which a liquid undergoes a phase change from liquid to solid. When solutes are added to a liquid‚ forming a solution‚ the solute molecules disrupt the formation of crystals of the solvent. That disruption in the freezing process results in a depression of the freezing point for the solution relative to the pure solvent. The amount of the freezing point depression
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determine the molar mass of an unknown solid. The freezing point of a solvent (Cyclohexane) was determined‚ and compare to the freezing point of Cyclohexane with the addition of two different concentration of unknown solid. The pure substance of Cyclohexane has defined physical properties. However‚ when a solute is added these properties are determined by the amount of solute added‚ also known as colligative properties. The temperature of the freezing point was lowered when the solid was added and it
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levels of management without adequate input or information to and from staff. Further‚ from my perspective‚ change is not experienced in a smooth manner as suggested by change models. I have experienced change that has not appeared to move beyond the unfreezing stages (Lewin‚ 1947)‚ and I have also experienced change that has regressed at different stages rather than move forward. If I were to work with employees as a change practitioner‚ I would highlight the realities of change so that employees are
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Colligative Properties The Physical Properties of Solutions Colligative Properties • There are 3 colligative or physical properties of solutions that you should know. They are Vapor pressure Boiling point elevation Freezing point depression Osmotic pressure is one you don’t need to worry about. 1. 2. 3. 4. Molality • Molality measures the moles of solute dissolved in the mass (kg) of solvent. • Molality normally expresses concentrations of colloids. • m = moles solute kg solvent
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Pierre Chem 112 Lab Due: 03/05/2015 Lab Report 14 Questions 1. Part A.3. Some of the cyclohexane solvent vaporized during the temperature versus time measurement. Will this loss of cyclohexane result in its freezing point being recorded as too high‚ too low‚ or unaffected? Explain. -The freezing point will be higher because the loss of solvent means that the molarity of solute is too high. The melting point will be lower than expected. 5. Part B.2. The solute dissociates slightly in the solvent.
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the key concepts in this experiment is the term freezing point depression. The definition of this phrase is that when a solute is dissolved into a solvent‚ their collective boiling point will be less than that of the original boiling point of the solvent. This incidentally leads to another important definition‚ the colligative properties of a solution. This means a particular set of characteristics that are unique to that solution. As the freezing point of the solution decreases‚ the solution then
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