Chem+Lab+Report+1.docx - Christopher Sampath CHM2045L.908 4 October 2018 Project 1 Lab Report Introduction Background The ability to identify unknown

Chem+Lab+Report+1.docx - Christopher Sampath CHM2045L.908 4...

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Christopher Sampath CHM2045L.908 4 October 2018 Project 1 Lab Report Introduction Background: The ability to identify unknown substances is a useful skill for any chemist. For example, it would be important for health inspectors to assess the quality of a community’s water supply and determine the presence of any toxic materials. It would also be important to analyze any minerals found on other planets and cross-reference them with minerals on Earth. By learning to identify unknown substances through a series of quantitative and qualitative tests, a chemist can be better prepared to explore and understand the world around them. Theory: This experiment will be conducted using both qualitative and quantitative tests. Some of the qualitative tests that will be used include the flame test, which determines the presence of certain metals in a substance based on the color of the flame that is produced, and the solubility test, which narrows down the possibilities for the identity of a substance based on whether or not they dissolve in ethanol and acetone. Some of the quantitative tests that will be used include the pH test, which determines how acidic or basic a substance is, and the conductivity test, which determines how well a substance serves as a conduit for electricity. Hypothesis/Objectives: If three unknown substances, A, C, and E, are put through a series of quantitative and qualitative tests, they will be revealed as Na2CO3, Ca(NO3)2, and CaCl2, respectively.
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Methods Part 1 Methods: The Flame Test began by taking a small metal rod, washing it in water, hydrochloric acid, and water again. The rod was then used to swab the interior of a beaker containing one of the three unknown substances. Then, the rod was held over an open flame and the initial color of the flame coming off the rod was recorded.
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