Freezing Point Depression Lab

Decent Essays
Brandon Thai
5/17/17
Freezing Point Depression
Abstract
The freezing temperature of pure Cyclohexane and a solution of Biphenyl and Cyclohexane was determined. This was done by examining the temperature curves for each solution. The freezing temperature for pure cyclohexane was determined to be 7.3 degrees celsius and the mixture of Biphenyl and Cyclohexane was 2.07 degrees celsius.

Introduction

The purpose of this experiment is to determine the freezing point for pure cyclohexane and a solution of biphenyl and cyclohexane. Calculating the molar masses and then comparing it to the accepted value. The equation ΔTf = Kf * m will be used to solve for the molality after a massed amount of solute is associated into a solvent, in which the difference

Related Documents

  • Superior Essays

    The Effect of Temperatures on Rate of Reaction of Alka-Seltzer Introduction: A. Background This particular experiment consists of a purpose of finding out the effect of various temperatures on the rate of reaction of the Alka-Seltzer tablets. Alka-Seltzer is a medical drug that acts as a pain reliever or an antacid, which helps neutralize stomach acidity, such as heartburn. Alka-Seltzer is a form of a baking soda which is also known as sodium bicarbonate, (NaHCO₃). When sodium bicarbonate (NaHCO₃) comes in contact with water (H2O), the compound dissociates into two different ions: sodium (Na+) and bicarbonate (HCO₃-) ions.…

    • 1619 Words
    • 7 Pages
    Superior Essays
  • Great Essays

    Multiple trials were carried out because the wrong method of distillation was used. At the first trial, simple distillation was used and the result wasn’t as expected. The boiling point of the alcohol product wasn’t the boiling point of the expected alcohol 2-methyl-2-pentanol. The boiling point of 2-methyl-2-pentanol is 120-122oC (ref.6); however, the boiling point of the alcohol product was about 76-80oC. Simple distillation is useful if the difference between 2 products boiling point is more than 100oC; however, the difference of boiling point between ether and 2-methyl-2-pentanol is less than 100oC, so this method cannot be used. Therefore, when the ether was distilled off, the alcohol vapor was carried over by ether vapor causing the lowered reading of the thermometer.…

    • 1123 Words
    • 5 Pages
    Great Essays
  • Decent Essays

    Defrosters Research Paper

    • 185 Words
    • 1 Pages

    You’re driving down a road and see it snowing sideways. The road is covered in snow and BAM you slide off the road and crash. This is a typical winter in Indiana and just think if you bought my new tires, The Defrosters. The wheels equipped with heat, wires, and batteries. You can adjust the heat and the heat ranges from 80 to 95 degrees, melting away that pesky snow.…

    • 185 Words
    • 1 Pages
    Decent Essays
  • Improved Essays

    Table 1. Possible Compounds for 64A 64A Melting Point Possible Identities of 64A Melting Point of Possible Identities 48.1°C-49.3 °C 4-Chlorobenzaldehyde Benzophenone 48°C…

    • 762 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    There were sp3 C-H peaks in the 2800-3100cm-1, sp2 C-H peaks in the 3100cm-1 range and C= C peaks in the 1620-1680cm-1. The conditions of this lab favored thermodynamic, since the reaction was under thermodynamic control that means the product with lost energy forms in the largest yield. 1-methylcyclohexene is the thermodynamic product because it is the most stable. The percent yield of product was 14.8 percent and the theoretical yield was 0.583g.…

    • 483 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    Molar Mass Lab

    • 463 Words
    • 2 Pages

    We will need to solve for the molality (m), number of moles of the solute per kg of solvent, by dividing ΔTf by kf. The molal freezing point depression constant, kf, is given to us for cyclohexanol at 39.4°C/m, and the ΔTf was determined experimentally using Logger Pro. Once we have that molality, we can then find the moles of solute used by multiplying the molality by the solvent used in kg. Finally, we can determine the molar mass by dividing the solute in grams added to the cyclohexanol by the moles of the solute calculated. The answer must be the molar mass of hexadecanol or…

    • 463 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    Dry Ice Lab

    • 289 Words
    • 2 Pages

    Dry ice is at -109.3 degrees F or -78.5 degrees C. The temperature of the water we used was room temperature which is usually 70 degrees F or 21 degrees C.…

    • 289 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    The Freezing point of water is 32° fahrenheit, But does anything affect the freezing point of water? The effect of salt and sugar lowering water’s freezing point is called Freezing Point Depression(FPD). When water freezes, its molecules slow down and “stick” together, and eventually slow down so much they stay in place and become a solid. However when salt or sugar is added, it “interferes with the formation of the crystalline bonds between water molecules that give ice its solidity”, Written by the Editors at infoplease in the article “Does sugar affect the freezing of water? Why?”.…

    • 293 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    Fractional distillation is a common method for separating components of a mixture by utilizing their boiling points to aid in the separation. As a mixture is heated, the component with the lower boiling point in the mixture vaporize, while the higher boiling point component will remain in solution. These vapors will rise to a cooler area where they will condense and this liquid will then be collected; this is known as the distillate. Eventually, the lower boiling component will boil off, and the higher boiling point component will begin to travel up into the condenser as the temperature reaches the boiling point of the second component. As the second distillate is collected, it will mostly contain the higher-boiling component.…

    • 1090 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    During the 1930s and 1940s, Dr. Josef Mengele, a German officer and physician in the Auschwitz concentration camps, performed a variety of experiments on the prisoners in the camp. Some experiments included High Altitude Experiments, Freezing Experiments, Malaria Experiments, Regeneration and Transplantation Experiments, Sea Water Experiments, and Sterilization Experiment. Due to World War ll, Mengele was ordered to experiment and observe specific conditions/factors put on people in order to gain knowledge to help the Nazi soldiers win the war. For example, the Freezing Experiments performed involved immerging subjects into freezing water, or left naked outside in the harsh conditions. This experiment recognized how individuals operate under…

    • 385 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    However, this temperature was lower than the boiling point of acetone, the most volatile solvent possibly present in the unknown solution, pointing to a source of error in the measurement of the temperature. This could have been due to an inaccurate thermometer or to an error in placing the thermometer too high. Because the boiling point was so low, the more volatile solvent was estimated to be acetone, which has a boiling point of 56.5°C. After fraction A was collected, the temperature of the stillpot was increased and should have produced a steady increase in a plot of the temperature versus total volume distilled while fraction B (a mixture of the two components) was collected, until a second plateau at the boiling point of the less volatile component. The temperature of the stillpot needed to be increased after collecting fraction A because the liquid left in the stillpot was then composed of a higher percentage of the less volatile component, with a correspondingly higher vapor pressure, meaning that it would boil at a higher temperature.…

    • 958 Words
    • 4 Pages
    Improved Essays
  • Decent Essays

    The freezing point of the cyclohexanol was about 17.7°C, and the freezing point for the unknown solute mixed into the cyclohexanol was about 6.2°C. So the approximate change in temperature of the two freezing points was about 11.5°C. With this calculated information, the found molar mass of the unknown solute B was about 278.4g/mol, which is close to given molar mass of octadecanol. Conclusion-…

    • 267 Words
    • 2 Pages
    Decent Essays
  • Great Essays

    Essay On Cryoprotection

    • 1581 Words
    • 7 Pages
    • 8 Works Cited

    Since most of the human body is made of water and by lowering the body below the freezing point of water will result in massive ice formation. Cryonic facilities can’t simply put patients into a vat of liquid nitrogen because their cells would freeze and simply shatter. Because of this reason, patients are protected from ice damage by using a mixture or agent (sort of a human antifreeze) to reduce, or even eliminate, ice formation. Conventional bypass technologies are used to circulate the solution throughout the body. When enough water is replaced with the agent, the patient is maintained at cryogenic temperatures for long-term care.…

    • 1581 Words
    • 7 Pages
    • 8 Works Cited
    Great Essays
  • Great Essays

    The purpose of this lab is to understand the effect that dissolved impurities will have on the freezing point of a mixture and what additive will affect the the freezing point the most. The freezing point of a liquid is, the point of a substance when the temperature of the solid and the liquid is equal. When water freezes the water molecules become organized and come closer together forming crystal particles of ice. When a solute (like salt) and a solvent (like water) mix together the salt becomes an impurity and makes it so the solution can’t crystallize.…

    • 1596 Words
    • 7 Pages
    Great Essays
  • Improved Essays

    Intermolecular Forces

    • 1213 Words
    • 5 Pages

    INTRODUCTION The trends in physical properties of organic compounds such as boiling points and melting points can be deducted from their structures, including size (molecular weight, surface area), shape and functional groups. These factors significantly influence the strength of the intermolecular forces of attraction present; and the nature and strength of intermolecular forces determine the variations in boilingpoints of organic compounds. The boiling point of a liquid is the temperature at which its vapor pressure equals the external or atmospheric pressure. At this temperature, every molecules of the liquid acquire enough kinetic energy to overcome the intermolecular forces attracting them to the other molecules.…

    • 1213 Words
    • 5 Pages
    Improved Essays