covalent compounds? What is the reason for this difference in melting points? (3 points) 2. Do ionic compounds conduct electricity as: (3 points) a. Solids? b. Liquids? c. Aqueous solutions (when the ionic compounds are dissolved in water)? 3. Do covalent compounds conduct electricity as: (3 points) a. Solids? b. Liquids? c. Aqueous solutions (when the covalent compounds are dissolved in water)? Part II: Lab Insert completed data tables for each part of the lab. Be sure that
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The process of separating a liquid from a solid (sediment) by gently pouring the liquid from the solid so as not to disturb the solid is Decantation. Filtration is the process of separating a solid from liquid by means of a porous substance –a filter- which allows the liquid to pass through but not the solid. Extraction is the separation of a substance from a mixture by preferentially dissolving that substance in a suitable solvent. Also‚ the process in which a solid passes directly to the gaseous
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How do different liquids and solids affect the boiling and freezing point of water? Name 02/12/12 ABSTRACT There are many different substances that affect the freezing and boiling points of water. This experiment was designed to test the effects of five liquid and five solid substances/mixtures on the freezing and boiling points of water. It was hypothesized that if we tested five liquid and five solid substances/mixtures then the results would show that the solids would have a greater affect
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Catie Bates 10/22/2014 Physical Science Physical Changes I like physical changes more than chemical changes. Some reasons are‚ physical change is "easily" reversible‚ how liquids can become solid and vice versa‚ the solid disappears but just the application of heat can boil the water off and get the salt back in the same form. Therefore‚ I like physical changes more than chemical changes. I like physical changes more than chemical changes because physical change is "easily" reversible because
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Objective: The purpose of experiment of density determination is to determine the densities of regularly shaped object and irregular shaped solids as well liquids. Density equal mass over volume. Materials Used: Materials used in this experiment was a regular shaped object and irregular shaped object and a ruler to take the measurements of the object. A graduated cylinder and electric beam balance were used to measure the volumes and masses of the object. As well 5-20% concentrated were
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Deanne del Valle Department of Biological Sciences‚ College of Science‚ University of Santo Tomas‚ España‚ Manila‚ Philippines Abstract Caffeine was extracted from Lipton tea leaves by multiple extraction techniques namely solid to liquid extraction and liquid to liquid extraction; the purification by sublimation and melting point determination. Three teabags with weight 6.2674g were boiled with water and then extracted with 60 mL DCM; extract was dehydrated with anhydride Na2SO4 then was collected
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Beer’s Law & Colorimetry Angela Carraway‚ Ph.D. and Peter Jeschofnig‚ Ph.D. Version 42-0140-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing
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PROPERTIES OF SOLUTIONS A solution is a mixture of materials‚ one of which is usually a fluid. A fluid is a material that flows‚ such as a liquid or a gas. The fluid of a solution is usually the solvent. The material other than the solvent is the solute. We say that we dissolve the solute into the solvent. Some solutions are so common to us that we give them a unique name. A solution of water and sugar is called syrup. A solution of sodium chloride (common table salt) in water is called brine
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Landauer Abstract The goal of the experiment was to isolate and purify the unknown D liquid and solid by using its acidic and basic characteristics in a chemically active extraction then to identify the unknowns by analyzing the physical properties on IR and NMR spectrums. The neutral solid was purified through recrystallization and the melting point range was determined to be 47.5oC to 48.9oC. The basic liquid was purified with simple distillation and the boiling point of 135oC was concluded. Through
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performed a series of reactions on copper powder and observed the changes it underwent. For the first step‚ we mixed nitric acid and copper powder‚ and noticed that a yellowish brown gas emerged‚ along with effervescence. The red solid disappeared and became a blue liquid. We know that we produced copper nitrate‚ nitrate gas‚ and water because the only two blue solutions in “A New Language” are copper sulfate and copper nitrate. It would make sense for us to have created copper nitrate‚ since we mixed
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