Refer to the calibration curve shown in the experiment. If the absorbance of the solution is 0.400, what is the concentration of the iron in that solution? Show or explain how you arrived at your answer.
I don't have your calibration curve.
To determine the concentration of iron in the solution based on the calibration curve, you need to follow these steps:
1. Examine the calibration curve: Look at the given graph or table of the calibration curve and identify the relationship between the absorbance (y-axis) and the concentration of iron (x-axis). Usually, the calibration curve will have a linear relationship between absorbance and concentration.
2. Find the absorbance value: In this case, you are given that the absorbance of the solution is 0.400. Locate this value on the y-axis of the calibration curve.
3. Draw a horizontal line: Draw a straight line horizontally from the point 0.400 on the y-axis until it intersects the calibration curve.
4. Identify the corresponding concentration: From the intersection point of the drawn horizontal line and the calibration curve, draw a vertical line down to the x-axis. The concentration value at this intersection point represents the concentration of iron in the solution.
5. Read the concentration value: Locate the position where the vertical line intersects the x-axis and determine the corresponding concentration value. This will give you the concentration of iron in the solution.
By following these steps, you can determine the concentration of iron in the solution based on the given absorbance value and the calibration curve.