This graph shows measurements of the absorbance of light for solutions containing different concentrations of Fe³⁺. Select the one statement below which best describes the graph. 

10.0 mL of a solution of Fe³⁺ was placed in a 100 mL volumetric flask. 5mL of nitric acid and 5 mL of KSCN solution were added. Water was added to make the solution up to the mark on the neck of the volumetric flask, and the solution was thoroughly mixed. The concentration of the solution in the volumetric flask was determined to be 0.00134 mol/L by spectrophotometry. What was the concentration of the original Fe³⁺ solution?

The graph below is a calibration curve for determining the concentration of Cu²⁺ from light absorbance at a wavelength of 610 nm. This calibration curve was created in the same way as the one involving Fe²⁺ you will generate in this experiment.

If solution of copper has an absorbance of 1.047 at 610 nm, what was the concentration Cu²⁺ in the solution?

This graph shows measurements of the absorbance of light for solutions containing different concentrations of Fe³⁺. Select the one statement below which best describes the graph. 

How do you measure the required volume of the standard Fe³⁺ solution which is added to the 100 mL volumetric flask in step 2?

10.0 mL of a solution of Fe³⁺ was placed in a 100 mL volumetric flask. 5mL of nitric acid and 5 mL of KSCN solution were added. Water was added to make the solution up to the mark on the neck of the volumetric flask, and the solution was thoroughly mixed. The concentration of the solution in the volumetric flask was determined to be 0.00209 mol/L by spectrophotometry. What was the concentration of the original Fe³⁺ solution?

The graph below is a calibration curve for determining the concentration of Cu²⁺ from light absorbance at a wavelength of 610 nm. This calibration curve was created in the same way as the one involving Fe²⁺ you will generate in this experiment.

If solution of copper has an absorbance of 1.047 at 610 nm, what was the concentration Cu²⁺ in the solution?

This graph shows measurements of the absorbance of light for solutions containing different concentrations of Fe³⁺. Select the one statement below which best describes the graph. 

How should you prepare volumetric flask before use?

How do you measure the 5 mL of 2 M KSCN solution which is added to the 100 mL volumetric flask in step 3?