Nick Boyea Billy Lee 3/9/11 Molar Mass by Freezing Point Depression Overview The purpose of this lab is to measure the freezing point depression of a solution of an unknown substance and BHT to determine the molar mass of the unknown substance. Summary of Lab Procedure If not already completed‚ crush a small amount of BHT and pack it into a capillary tube. Use a small rubber band to clamp the capillary tube to the thermometer‚ and fasten the thermometer to a ring stand. Fill a Thiele tube
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Melting Point Lab Introduction: The point of this lab was to determine the eutectic point for the naphthalene biphenyl mixture‚ as well as determining the melting point of an unknown substance by comparing it with two known samples. Melting point is a temperature in which a substance changes from solid state to liquid state. Melting points are used to determine whether the given substance is pure or not. Substances that melt sharply‚ less than 1-2°C indicates pure substance. Melting point can
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Lab Name: Molar Mass by Freezing Point Depression Researcher: Isabella Cuenco Lab Start Date: November 9‚ 2012 Lab Completion Date: November 9‚ 2012 Table of Contents SECTION NAME I. Introduction II. Procedure III. Data IV. Analysis V. Conclusion PAGE NUMBER I. INTRODUCTION Purpose: The purpose of the lab is to find the molar mass of an unknown substance by measuring the freezing point depression of a solution of the unknown
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freezing point or melting point of water is the temperature at which water changes phase from a liquid to a solid or vice versa. The freezing point describes the liquid to solid transition while the melting point is the temperature at which water goes from a solid (ice) to liquid water. In theory‚ the two temperatures would be the same‚ but liquids can be super cooled beyond their freezing points so that they don’t solidify until well below freezing point. Ordinarily the freezing point of water is
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EXPERIMENTAL SCIENCE PROJECTS:The Effect of Salt on the Boiling Temperature of Water(Initially prepared by a 4th Grade student)To quickly jump to a section below click on:INITIAL OBSERVATIONCooking instructions tell you to add salt to water before boiling it.PROJECT TITLEThe Effect of Salt on the Boiling Temperature of WaterPURPOSE OF THE PROJECTTo find out how table salt affects the boiling temperature of water.HYPOTHESISAdding table salt to boiling water will cause the water to boil at a higher temperature
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This paper is a full determination for certain chemicals and their boiling points. It lists some already but given the atomic numbers of any material this project includes a conversion and calculation chart to find the freezing point of most any material. GOOD LUCK! Abstract: In this lab we determined the freezing point‚ and Kf‚ of pure 2‚4‚dichloralbenzne as well as a 2‚4‚dichloralbenzne/biphenyl solution. We used this information to determine the molar mass of an unknown (#24) by the 3rd step
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North Greenville University‚ I was a member and a student of the Spartanburg County School District 2. Specifically‚ I was part of the Boiling Springs community. A remote place that didn’t have much to offer at first glance; although‚ this was probably due to my birth in a crowed and industrialized city. Yet‚ during the almost decade that I have lived in Boiling Spring it has been becoming increasingly similar to the hustle and bustle that I left behind. New businesses and roads lead to families
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Somatosensation Lab Using Two Point Thresholds Alex Mendelson 2/24/2014 Two Point Thresholds This week in Sensation and Perception Lab we performed a lab that measured an individual’s somatosensation‚ which is their sense of touch. In order to measure the sense of touch we manipulated the thresholds of sensation by using the two point threshold procedure. The two point threshold procedure measures the smallest distance of two separate but adjacent points of stimulation on the
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Purpose: The purpose of this lab was to determine the freezing point of pure water‚ the experimental van’t Hoff factor for a substance and the molar mass of an unknown solution. Reagents: 25mL deionized Water ¼ to ½ inches of rock salt 25mL Sodium Nitrate (NaNO3 ) 25mL unknown solution – handle unknown solution carefully Procedure: For part 1‚ the freezing point of deionized water was determined. An ice bath was prepared by filling a 600mL beaker ¾ full of ice and covered with ¼ to
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Question 1 (5 points) 1. Which of the following may lead to vertical integration? a) Technological interdependencies b) Reduced search and bargaining cost c) The hold-up problem d) All of the above Question 2 (5 points) Effective collusion generally is more difficult when a) the number of oligopolistic firms involved decreases b) the number of oligopolistic firms involved increases c) when customer orders are small‚ frequent‚ and received on a regular basis as compared
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