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MATS1101 - Engineering Materials and Chemistry - T3 2025
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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 0.00181 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 1.081 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.
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 0.00225 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 0.943 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.
What is the best way to quickly but accurately fill a volumetric flask to the mark?
Which of these sketches shows the liquid level in the neck of a volumetric flask when it is filled to the mark?