Chemical compounds that are available to determine are CaCO3, CaCl2, Ca(NO3)2, mgCl2, MgSO4, KCl, HCl, HC2H3O2, KNO3, K2SO4, NaC2H3O2, Na2CO3, NaCl, Na2SO4, HNO3, H2SO4, HNO3, H2SO4, NH4Cl, (NH4)2SO4, K2CO3, 0.1 M AgNO3, 0.2 M BaCl, Mg(s), NaOH, and KOH. To start this experiment, start with the flame test by gathering a Bunsen burner and a Nichrome wire. Connect the Bunsen burner with a rubber tube to a laboratory gas. To prepare solutions for the flame test, weigh out 0.205 gram of Unknown Compound using an analytical balance and mixed it into a 140 mL beaker filled with 20 mL ionized water. Ensure that solid is completely dissolved using a stirring rod.
This shows that these substances conduct electricity as a solid. The next test was conductivity as a solution. From our findings, sucrose had poor conductivity, while ascorbic acid and sodium chloride had good conductivity. Ascorbic acid conducts electricity because
In this experiment no deviations were made. Wilfrid Laurier University Chemistry Department. Winter 2023. Electrochemistry. Pages 79-82 in Chemistry 111 Lab Manual.
Our latest lab covered a detailed description of atoms and molecules, laid out in a distinctive way using balls and sticks for valence electrons and bonds. We were given charts to fill out recoding our findings regarding several molecules and their electron count, type of bonds,
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
The observations that were made during the conductivity testing process were that, according to the chart given in the lab, the covalent compounds in solution had a low scale of conductivity, while the ionic compounds in solution had a high scale of conductivity. The sugar had a scale of 0 with no red light seen in the red LED and no light present in the green LED, and the levulose had a scale of 1 with a dim red light seen in the red LED and no light present in the green LED. The baking soda had a scale of 3 with a bright red light seen in the red LED, and dim light present in the green LED and the table salt had a scale of 4 with a very bright red light seen in the red LED and medium light present in the green LED. These observations prove that substances that are made of covalent bonds have a low conductivity in a solution, while the substances that involve ionic bonds have a high conductivity in solution. When Unknown Substance D was stirred in a beaker with the distilled water and tested for its conductivity, Unknown D’s conductivity in solution had a scale of 1 with a dim red light seen in the red LED and no light present in the green LED, just like levulose which is also a covalent compound.
This result showed that the unknown substance had a high melting point, making it identified as sodium chloride. Insoluble substance C was identified by adding two drops of iodine tincture. Substance C turned into a deep blue color in the solution and was then determined to be cornstarch since the blue color indicates if a substance in the solution was cornstarch. Substance D in this experiment was not given but through the report and different testing, substance D would be sodium hydroxide. Substance E would now be the next experiment in the lab..
Scientist preform many qualitative analyses to determine the identity of an unknown ionic compound. The determination of the compound involves preforming a series of test and using a high level of logical thinking. In the project unknown cations and anions were tested to determine each identity. Once the identity was determined logic trees for each, the cation and anion, were constructed to help identify the unknown compound.
In this experiment, a series of SDS solutions at various concentrations are tested for their conductance at two different temperatures, 25 °C and 50 °C. For detailed procedure, refer to the lab manual (J. F. Wójcik and T. S. Ahmadi, Experimental Physical Chemistry, 2015; p.125-129.). Data Sodium dodecyl sulfate has a molecular weight of 288.372 g/mol, with a density of 1.01 g/cm³. The melting point of SDS is in the ranges of 204 -205.5 °C. In this experiment, 8.6151 g of SDS was weighed to make a 500-mL 0.06 M solution.
The purpose of this lab is to test various element for their conductivity, solubility, and physical characteristics. We will see if the object is a metal, nonmetal or a metalloids (semimetals). Metals are commonly known as to be ductile (can be used in wiring), malleable (can’t be break down when pressed down hard), have a metallic luster, and are conductors of heat and electricity. Non-metals are more likely to be non lustrous, brittle and poor conductors of heat and electricity. Where as metalloids has the same characteristics of both metals and nonmetals.
As a result of their strong bonds these molecules have a high boiling and melting point, a high polarity and are typically solid at room temperature. Ionic bonds involve a metal and nonmetal because metals
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
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
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, definitions of each relating factor were researched, leading 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 is formed when two or more nonmetal atoms share valence electrons; covalent compounds are also categorized into two sections: polar covalent and nonpolar covalent. Furthermore, polar covalent compounds dissolve in water, while nonpolar covalent compounds do not.
In the beginning of 7th semester I chose Material Science and Technology as my minor elective which comprised of the following courses : Introduction to spintronics and Nano science and technology. I realized that one of the bigger challenges, that will have an important bearing on our lives in the near future, is the development of efficient sustainable energy systems. Nanotechnology not only refers to the miniaturization but also the precise manipulation of atoms and molecules to design and control the properties of the nanomaterials. Focusing on the energy domain, nanotechnology has the potential to significantly reduce the impact of energy production, storage and
