alcohol lab - CH116-D3 15 Nov. 2007 Determination of...

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CH116-D3 15 Nov. 2007 Determination of Alcohol Content in Wine Experimental: First, dilutions of the 20% (v/v) ethanol solution were prepared with concentrations of about 6%, 8%, 10%, 12%, 14%, 16%, and 18% . 1 mL of each of these dilutions was placed in a cuvet. In addition, 1 mL of the 20% (v/v) ethanol solution and 1 mL of Unknown B were each placed in a cuvet. For each of the solutions, the eth- oxy-cerium complex was formed by adding 2 mL of the ethoxy-cerium solution to the cu- vet. Immediately upon mixing, the absorbance was measured in the spectrophotometer. Description of the Relationship between Absorbance and Concentration: The concentration of a solution is directly proportional to its absorbance. Each molecule in homogenous solution can absorb a certain amount of light. The solutions with higher concentrations and more molecules will absorb more light, creating a more intense color with a higher absorbance value. It is possible for a scientist to determine a solution’s
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alcohol lab - CH116-D3 15 Nov. 2007 Determination of...

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