preview

Nt1310 Unit 9 Final Lab Report

Decent Essays
Part A

Pre-Lab for making 5 Standard Solutions

Show calculations and procedures here

Part B- Prepping Visible Spectrometer

First, obtain a SpectroVis Plus device and connect with its corresponding LabQuest2 device. You need to calibrate by turning on the machine, allow the inner lamp to start heating up, and prepping a blank in the process. Obtain a dry cuvette, fill it with distilled water, and place into the SpectroVis plus device. Before doing so, be sure to wipe the outside of the cuvette with a Kimwipe to clean off any fingerprints that might be present. Fingerprints will skew with the calibration. Once the device notifies you that calibration is complete, click okay and prep for the next part of the lab.

MANUAL Q1: What is a blank?
…show more content…
Make sure to use the same type of cuvette to keep the width consistent and to prevent any experimental error from arising. Obtain 5 of the same type of cuvettes and pre-rinse them thoroughly. Label them numbers one through five in increasing molarity. Then, fill each of the cuvettes with one of the five solutions you created back in Part A. We will first examine the solution that exhibits the highest concentration or molarity. Make sure to wipe the outside of the cuvette with a Kimwipe before placing into the SpectroVis Plus device. Observe the graph that is generated and make sure to take note where the maximum absorbance takes place.

MANUAL Q2: What is this value (path length of cuvette)? What does it represent?

MANUAL Q3: What should you pre-rinse the cuvette with?

MANUAL Q4: Why should you wipe the outside of the cuvette before placing into the SpectroVis?

MANUAL Q5: What color of light is being absorbed by the sample solution? How is that color related to the color of the solution?

Part D- Beer's Law
…show more content…
Pour 50 mL of distilled water into a 100 mL beaker, and then add the unknown substance into it. Mix thoroughly to create the aqueous solution. Now fill a new cuvette with this new solution and place into the SpectroVis Plus device; after wiping the outside with a Kimwipe as usual. Be sure to take note of the absorbance when wavelength is at its maximum. Afterwards, Be sure to take all solutions containing Iron(III) and pour them into the container specified for hazardous wastes.

Part F- Final Analysis

Obtain a scintillation vial and label it using tape and a pen. For this part of the lab, make sure to record the mass of the empty vial using a digital scale before proceeding. Now, obtain 0.100 g of the same unknown substance and place into the vial. Record the exact mass again and be sure to take note of any crystal formation that occurs.

Observation:

Now, take the vial and place it into a laboratory drying oven. Leave it here for at least one hour to get the most accurate of results. After it is heated, place the vial into a desiccator to help bring it back down to room temperature. Finally, records its mass one last time. Keep placing the vial into the desiccator until the mass of the crystals and vile stops
Get Access