Glycerin's Melting Point Lab Report

METHOD: The following procedure was taken from the 2017 Millsaps College lab manual.1 The experiment was split into two parts, part A and part B. Part A was to find the heat capacity while part B determined the specific heat of an unknown metal. This was the final goal of the lab. To start, a temperature probe had to be connected to a LabQuest2 data collection device. 100.0 mL of deionized had to be added into a Styrofoam cup.

The purpose of this lab was to be able to use physical characteristics to determine the identity of an unknown compound. The data from this experiment classified aluminum as metallic; ascorbic acid, paraffin, palmitic acid, sucrose, graphite, and water as molecular; sodium chloride as ionic. In order to determine this, 3 tests were conducted. The first test was to test the conductivity of each substance at room temperature. In this test, only graphite and aluminum conducted.

The quantitative solubility of the unknown compound was determined to be 29/100ml. The known solubility of sodium sulfate is 28.11g/100mL water. Using the found solubility to compare to the known solubility of sodium sulfate. This solution created in the solubility test, the conductivity of the unknown compound was tested using an Ohmmeter to measure the resistance of the solution. Resistance is the measure of a substances ability to conduct

This result indicates that for every milliliter of water, .2 grams of the compound was dissolved; the science behind the test is that water is added in increments to determine how many mililiters of polar water molecules are necessary to break apart the polar or ionic bonds in a certain amount of solute. A Litmus paper pH test of the compound dissolved in water revealed that the solution had a pH of 7. This indicated that the solution of water and dissolved compound was neutral, or neither basic nor acidic5. The result of this test is in agreement with the identified compound because there are no OH- cations or H+ anions in KCl.

• ionic compounds can only conduct electricity if their ions are free to move. Ionic compounds only conduct when they are melted or dissolved in water and they do not do not conduct electricity when they are solid. Sodium chloride– it is soluble in water, it has high boiling and melting point, it does not conduct in its solid state, except when it dissolves in water or melted then it will conduct electricity.

bound much tighter and form more stable molecules than atoms of the ionic bond. The chemical formulas for covalent compounds are referred to as as molecular formulas because they exist as separate molecules. Another reason on why covalent is the best naming system is because the things in our daily lives such as oxygen, nitrogen gas, water vapor, and carbon dioxide are all made up of covalent compounds. Covalent compounds are common in the air we breathe, the gas we use to fuel our cars, the water we drink and even the food we eat. Without this bond we wouldn't have the things that help us carry on with our lives.

Introduction: In this assignment, I will be doing two experimentations on examining the impact of temperature on the Alka-Seltzer’s response time. The first experimentation that I will be doing involves some water that is room temperature. The second experimentation that I will be doing involves some water that is very hot. If I want to be able to figure out the impact of the temperature on water, I will have to document the time it will take for the Alka-Seltzer to go into solution.

The possible explanations and changes to make are similar to the previous questions. Conclusion and Future Experiment 18. The identity of the product and unknown were 4-tert-butylbenzyl phenol ether and tert-butyl phenol respectively. The key to making this discovery was the melting point and TLC results!

As the water was added to the heated sample, the solid copper chloride began to dissolve into a pretty blue-green solution, as a result of the compound breaking apart into individual Cu2+ and Cl- ions. When the water was first mixed with the copper chloride, it dissolved the solid pretty slowly, turning into a sort of mush at first. However, eventually, the water dissolved all of the solid copper chloride and the solution was homogenous. Since the compound just changed physical form, from solid to liquid, this change was purely physical. Just as in the first part of the experiment, the chemical character of the compound was not altered, so the compound did not experience a chemical change.

There are two different types of covalent bonds, polar and nonpolar covalent bonds. In a polar covalent bond, one atom exerts a greater force of attraction on the bonding electrons than the other. In a nonpolar covalent bond, the electrons are equally shared between the atoms. You can tell the difference between an ionic bond and the two covalent bonds because in an ionic bond the electrons are being transferred between

Properties 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

In terms of solubility, covalent compounds are insoluble in polar solvents like water but dissolve in non-polar solvents like kerosene. They have a slow rate

I. Introduction This experiment uses calorimetry to measure the specific heat of a metal. Calorimetry is used to observe and measure heat flow between two substances. The heat flow is measured as it travels from a higher temperature to a lower one. Specific heat is an amount of heat required to raise the temperature of one gram of anything one degree Celsius. Specific heat is calculated using several equations using the base equation: q=mc∆T II.

Properties of Ionic and Covalent Substances Lab Report Introduction The purpose of this lab was to determine which of the following substances: wax, sugar, and salt, are an ionic compound and which are a covalent compound. In order to accurately digest the experiments results, research of definitions of each relating led to the following information: ionic compounds are positive and negatively charged ions that experience attraction to each other and pull together in a cluster of ionic bonds; they are the strongest compound, are separated in high temperatures, and can be separated by polar water molecules. A covalent compound forms when two or more nonmetal atoms share valence electrons; covalent compounds are also

One of the most important types of bonds is ionic and covalent bonds which affects the entire way the elements bond together. Ionic bonds are the bonds that form between a metal, known as a cation, and a nonmetal, an anion. Ionic bonds occur through an attraction of opposite charged ions and covalent bonds are simply the bonds between two nonmetals. The thing that sets the two bonding types apart besides what they bond is how they bond. Ionic bonds transfer their electrons to each other.