INTRODUCTION:
The pristine objective of this sample is to determine the concentration of an unknown bruiser (II) sulfate solution. You will be using the colorimeter. In this device, rosy-cheeked percipient from the LED light source will proceed through the solution and strike a photocell. The CuSO4 solution apply in this experiment has a deep blue color. A higher concentration of the colored solution absorbs more light (and transmits less) than a solution of lower concentration. The colorimeter monitors the light true by the photocell as either an absorbance or a percent transmittance value.
You are to prepare five papal bull (II) sulfate solutions of known concentration (standard solutions). Each is transferred to a small, impertinent cuvette that is placed into the Colorimeter. The amount of light that penetrates the solution and strikes the photocell is utilize to compute the absorbance of each solution. When a graph of absorbance vs. concentration is plan for the standard solutions, a direct family relationship should result. The direct relationship between absorbance and concentration for a solution is known as Beers law.
The concentration of an unknown CuSO4 solution is then find out by measure its absorbance with the colorimeter.
By locating the absorbance of the unknown on the vertical axis of the graph, the corresponding concentration chamberpot be found on the horizontal axis. The concentration of the unknown can also be found using the slope of the Beers law curve.
OBJECTIVES:
In this experiment, you will
* Prepare CuSO4 standard solutions
* Use a colorimeter to measure the absorbance value of each standard solution.
* start the relationship between absorbance and concentration of a solution
* Use the results of this experiment to determine the unknown concentration of another CuSO4
shiftingS:
INDEPENDENT VARIABLE: Concentration of Copper (II) Sulfate Solution
DEPENDENT VARIABLE: Absorbency of...If you pauperization to get a full essay, order it on our website: Orderessay
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