Project 3
Identification and Synthesis of an Unknown Ionic Compound
Mitchell Morgan
CEM-161-007
Josh Ward
28th October 2015
Abstract
The chief objective of this experiment was to identify the unknown compound. The following tests were conducted to eventually establish the identity of the compounded: qualitative solubility tests, anion and cation tests, flame test, and the formation of a precipitate. The physical properties of the unknown ionic compound found that it has no smell and was soluble in water. No ammonia smell was formed when conducting the analysis of cations while the flame test created a color comparable to that of a pale violet signifying that the unknown compound contained potassium. Lastly, the anion test for chloride …show more content…
This was done by documenting the state of matter, its smell using the wafting technique, color, and structure. Following this the solubility test was conducted. This was completed by taking 1g of the unknown compound and placing it within 100mL of distilled water inside a 150mL beaker. Stirring the solution using a glass rod, observations of the unknown compound dissolving (or not) after 10 seconds are recorded. Next follows the Anion Tests in which a chloride ion test and a sulfate test were conducted. This is completed by taking 1mL of the unknown solution and placing it within a test tube, then adding 1mL of 6 M HNO3 and 1mL of AgNO3 and stirring with a glass rod for 10 seconds to observe the formation of a precipitate in the chloride ion test. For the sulfate test, this is completed by taking 1mL of the unknown solution and placing it within a test tube, then adding 1mL of 6 M HCl and 1mL of BaCl2 and stirring with a glass rod for 10 seconds to observe the formation of a precipitate. Following the Anion Tests are the Cation Tests in which we find the flame test and the ammonium test. For the flame test, a nichrome wire is cleaned by dipping it into HNO3 and burning it on a Bunsen burner until the resulting flame is colorless. After the wire has been cleaned, a small portion of the unknown compound is placed on the wire and held over the flame until a color can be recorded. Lastly, for the synthesis reaction, this procedure begins by adding 4.571 g of K2CO3 and 3.68 g of CaCl2 into two different beakers containing 50mL of water each. Following this, the two solutions must be combined and mix thoroughly. Using a filtration device, the KCl(aq) must be separated from the CaCO3(s). After this is done, place the solution atop a hot plate and put at setting 5. Boil the solution until all of the liquid has evaporated. Lastly, remove the remaining precipitate from the beaker and
Identification and Synthesis of an Unknown Ionic Compound
Mitchell Morgan
CEM-161-007
Josh Ward
28th October 2015
Abstract
The chief objective of this experiment was to identify the unknown compound. The following tests were conducted to eventually establish the identity of the compounded: qualitative solubility tests, anion and cation tests, flame test, and the formation of a precipitate. The physical properties of the unknown ionic compound found that it has no smell and was soluble in water. No ammonia smell was formed when conducting the analysis of cations while the flame test created a color comparable to that of a pale violet signifying that the unknown compound contained potassium. Lastly, the anion test for chloride …show more content…
This was done by documenting the state of matter, its smell using the wafting technique, color, and structure. Following this the solubility test was conducted. This was completed by taking 1g of the unknown compound and placing it within 100mL of distilled water inside a 150mL beaker. Stirring the solution using a glass rod, observations of the unknown compound dissolving (or not) after 10 seconds are recorded. Next follows the Anion Tests in which a chloride ion test and a sulfate test were conducted. This is completed by taking 1mL of the unknown solution and placing it within a test tube, then adding 1mL of 6 M HNO3 and 1mL of AgNO3 and stirring with a glass rod for 10 seconds to observe the formation of a precipitate in the chloride ion test. For the sulfate test, this is completed by taking 1mL of the unknown solution and placing it within a test tube, then adding 1mL of 6 M HCl and 1mL of BaCl2 and stirring with a glass rod for 10 seconds to observe the formation of a precipitate. Following the Anion Tests are the Cation Tests in which we find the flame test and the ammonium test. For the flame test, a nichrome wire is cleaned by dipping it into HNO3 and burning it on a Bunsen burner until the resulting flame is colorless. After the wire has been cleaned, a small portion of the unknown compound is placed on the wire and held over the flame until a color can be recorded. Lastly, for the synthesis reaction, this procedure begins by adding 4.571 g of K2CO3 and 3.68 g of CaCl2 into two different beakers containing 50mL of water each. Following this, the two solutions must be combined and mix thoroughly. Using a filtration device, the KCl(aq) must be separated from the CaCO3(s). After this is done, place the solution atop a hot plate and put at setting 5. Boil the solution until all of the liquid has evaporated. Lastly, remove the remaining precipitate from the beaker and