Essay On Freezing Point
ASSIGNMENT-CHEM-201 STUDENT NAME: SAEED AHMAD STUDENT ID: BC160401916 Question No. 1 What is the relationship between Freezing point depressions Boiling Point Elevation? ANS: The relationship between the freezing point depressions and boiling point elevation are following First we discuss freezing point depression Freezing point depression: Freezing point depression is a colligative property detected in solutions those results from the overview of solute molecules to a solvent. The freezing points of solutions are all lesser than of a pure solvent and are in a straight line relative to the molality of the solute. …show more content…
Difference between the boiling points of the pure solvent and the solution is comparative to the immersion of the solute particles : ΔTb=Tb (Solution) –Tb (Solvent) = Kb × m The colligative properties of a solution be contingent on the comparative numbers of solute and solvent subdivisions, they do not be determined by on the nature of the particles. Colligative properties change in quantity to the immersion of the solute particles. We differentiate between four colligative properties: vapor pressure lowering, freezing point depression, boiling point elevation, and osmotic …show more content…
In fact, as the boiling point of a solvent rises, its freezing point drops. The solute (NACL) decreases the freezing point of the ice, and the ice to melt at a lower temperature. Decrease in the vapor pressure of the solvent that occurs when a solute is complementary to the solvent causes a rise in the boiling point and fall in the melting point of the solution. Solution can't boil at the same temperature as the untainted solvent. Boiling Point Elevation and Freezing Point Depression. The adding of a nonvolatile solute to solvent estates the boiling point of the solvent to rise and the freezing point of the solvent to fall. The boiling point of the solution rises and the freezing point of the solution
Explain Why Did The Alaskan Way Viaduct Collapse
464 Words | 2 PagesWhen atoms are cold they sink because they are more compacted and don’t move around as much. Sink or Float was a lab that showed about temperature and density changes. With the cold water we saw it sink and just stay at the bottom of the container without moving. When the hot water was added it made it rise to the top of the container and spread. That showed us that the bottom layers would be hotter and the top layers would be colder.
Boiling Point In Intermolecular Science
1053 Words | 5 Pages(2005) states that all molecules have different boiling points, this is due to the intermolecular forces between the atoms. Therefore, the more intense the intermolecular force is the higher the boiling point, and the lower intensity, the lower the boiling point. This paper aims to discusses the order of the boiling points of 3-methyl-1-butanol and 3-methylbutanal, 1-Hexanol and 1-Pentanol, examining the differences between them. (De Marco et al. 2014). Results Table 1.
Cold Water Lab
630 Words | 3 PagesIntroduction The intent of this experiment is to understand how hot and cold water interact with each other by combining clear hot water and black ice cold water. I hope to learn more about how hot and cold water interact with each other. As of now, I know that cold water is denser than hot water. Knowing this I formed my hypothesis.
Lab Report Scaffold: Bromination Of Trans-Cinnamic Acid
904 Words | 4 PagesYes, the melting point data does make sense. While the melting point range was close to the given temperature range, the data was still a little lower than expected. This may have been caused by impurities in the product, since impurities cause melting point range to decrease. The product was observed moving up the capillary tube during melting point analysis, which indicates that the product was not completely dry before melting point range was taken. The water in the product evaporated and caused the product to be pushed up.
Essay On The Effect Of Temperature On Osmosis
1159 Words | 5 PagesWhen temperature is increased, the amount of obtainable energy increases; meaning that particles will move at faster pace at a higher temperature. Thus rate at which molecules diffuse will progressively speed up as the temperature increases. However if temperature of solution is decreased the rate of osmosis will decrease and rate at which molecules diffuse will be significantly less than that of higher
Essay On Egg Freezing
1493 Words | 6 PagesEgg Freezing (scientifically known as human ocyte cryopreservation) is a process in which a woman's eggs (oocytes) are extracted, frozen and stored. In the future, the eggs can be thawed, fertilized, and transferred to the uterus as embryos. In simpler language, egg freezing is the freezing of fertility for future. Cryopreservation although is not new. Since the 1950’s, human sperm has been frozen and stored, and since the 1980’s, human embryos have been cryopreserved.
Cognitive Properties Of An Unknown Lab Report
976 Words | 4 PagesTitle and Authors Colligative Properties of an Unknown Adriana Garcia and Demonta Coleman. Chemistry 112-591 Introduction Cold-tolerant fish and animals survive the freezing waters and temperatures in which they live unlike other animals that could freeze to death due to their ability of lowering the freezing point of water in their bodies. This is due to freezing point depression, which is a colligate property, a physical property that depends on the number of solute particles in the solution. The purpose of the experiment was to determine the identity of an unknown solute by using the concept of freezing point depression.
How Does The Concentration Of Water Affect The Preparation Of Nacl Rates
1864 Words | 8 PagesThe boiling point of the solution will be higher than that of the pure solvent itself. The boiling point of a liquid is the temperature at which its vapor pressure is to equal the atmospheric pressure. When a solute is added there are less solvent molecules near the surface and the solvent’s vapor pressure will decrease, so the vapor pressure of the solution will be less than that of the solvent. For the vapor pressure to reach the atmospheric pressure, a higher temperature must be reached, which means the boiling point is elevated. According to this theory, adding salt to water would make the boiling point higher, and make it harder to reach the boiling point.
Nucleophilic Substitution Reactions Lab
1039 Words | 5 PagesThe data table provided below obtained melting point data for crude product, pure product, and mixture of the pure and 4-tert-butylbenzyl. 12. The TLC data obtained is provided in a table below. The TLC data was conducted solely in a 9:1 hexane/ethyl acetate solvent solution as opposed to the 1:1 and pure hexane solution as well. This was due to the lack of time, but as explained in number 7, a very polar solvent (1:1 solution) or non-polar solvent (pure hexane) is not ideal when obtaining
Nacl Mixture And Freezing Point Lab Results
848 Words | 4 PagesBackground Information In this lab KCl, NaCl, and a mixture of MgCl2 and NaCl are the independent variables that all lower the freezing point of water. Ice is used as the controlled variable because it is what the salts are lowering the freezing point of. Salt (Na) weakens intermolecular forces of water, thus lowering the the freezing point. This is why in colder climates where icy roads and walkways are a liability, salt is often scattered over areas that are slick with frozen water.
Properties Of Substances Lab Report
1038 Words | 5 PagesProperties of Substances Express Lab 1)The purpose of this lab was to compare the physical properties of different types of solids and how the properties of solids are determined by their intermolecular forces and their intramolecular bonds. Then we were to classify each type of solid as either ionic, metallic, non-polar molecular, polar molecular, or network. Paraffin wax classified as a non-polar molecular, Silicon dioxide was classifies as a network, Sodium chloride was classified as ionic, Sucrose was classified as polar molecular and Tin was classified as metallic. (2)The intermolecular forces that are present in Paraffin wax are dispersion forces, because it is non-polar and carries a negative charge. Followed by Sucrose that has
Recrystallizing Benzoic Acid Lab Report
1019 Words | 5 PagesPurpose/Introduction The process of recrystallization is an important method of purifying a solid organic substance using a hot solution as a solvent. This method will allow the separation of impurities. We will analyze Benzoic Acid as it is dissolved and recrystallized in water and in a solvent of Methanol and water. Reaction/Summary
Essay On Fractional Distillation
740 Words | 3 PagesDuring the process a mixture is separated into several parts called fractions. Mixtures contain different substance with different boiling points, the differences in boiling points is the main reason fractional distillation is effective. The temperature at which a phase change occurs from liquid to vapor is the boiling point. Fractional distillation Column Fractional distillation column is a fractionating column used for separating a mixture into its various
Benzoic Acid Lab Report
767 Words | 4 PagesIntroduction Solubility is a chemical property that is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called saturated solution. For example when a sample of sodium chloride solution in water is heated the behavior of the reaction is endothermic obstructing exothermic behavior. Another relationship that can be said about solubility is that the solubility of a solid substance increases as the temperature increases. The solubility of solutes is dependent on temperature.
Distillation Lab Report
1300 Words | 6 PagesAbstract — This experiment was conducted to familiarize the students with the procedures regarding distillation—to be more precise, the separation of ethanol from an alcoholic beverage—using a distillation set-up consisting of boiling chips, a Bunsen burner, a condenser, a thermometer and several other materials. In the end, it was discovered that one may actually separate a homogeneous mixture, given that the components of said mixture differ in volatility and that they utilize a complete distillation set-up and follow laboratory safety rules and regulations. Keywords — Matter, homogeneous and hetereogeneous mixtures, distillation, volatility, boiling point I. INTRODUCTION There are typically two categories of matter, these are pure substances
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