Compare The Rate Law For The Reaction Of Crystal Violet And Sodium Hydroxide

Kinetics is the study of the rate of chemical processes. The kinetics of the reaction between crystal violet and NaOH was studied. In order to monitor crystal violet concentration as a function of time, a spectroscopic colorimeter was used. What is the rate law for decolorization of crystal violet? In order to figure this out, the rate of the reaction of crystal violet and sodium hydroxide must be found. In this experiment, the initial goals were to determine the overall rate law for the rate of decolorization of crystal violet in basic solutions as a function of time and to determine the rate law for the reaction including the actual value of k; Rate = k[A]x[B]y. The rate of a reaction was expected to depend on the concentrations

The Beers Law calibration experiment used many concentrations of crystal violet solutions. Each of these solutions were test and analyzed in order to determine the absorbance of each concentration The results were than graphed and produced a slope of 1.00E05 with an intercept of -2.21E-02.

Place the beaker on the hot plate, place the thermometer in the beaker and set the hot plate to 5oC.

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.

9) Trial E: Remove the syringe and empty the beaker. Add a Thermometer to the beaker. Add 200 mL of Room Temperature water to the beaker and heat with a Bunsen Burner until it reaches 100° C. Remove the Bunsen Burner. Repeat Steps 5 & 6.

1. Place a plastic measuring trough on top of the digital balance, and press the "tare/on" button so that the mass of the trough will be "ignored." The digital balance should read "0.000 g" after this step.

Heat crucible and lid to redness, cool it, and determine and record its mass to the nearest 0.01 g. 2. Place powdered hydrate in the crucible, but leave it slightly ajar. 3. Gently heat the covered crucible to avoid spattering. When there is no further tendency to spatter, strongly heat the crucible for about 5 minutes.

First, find the mass of the dry empty crucible. Make sure that the tongs are used to transport and hold the crucible securely, as well as the wire gauze to avoid the crucible from falling. Insert 2-3 g of white powder into crucible. Then, find the mass of the crucible with the white powder on the pipe steam and leave lid slightly ajar. Heat crucible gently (top of blue flames) with lid on until bubbling ceases. When bubbling subsides, place lid ajar. After, place the crucible on wire gauze and allow crucible to cool for approximately eight minutes. Then, find the mass of the crucible with contents in it (A). Next, place crucible on pipestem triangle once again and heat for two minutes. Again, let the crucible to cool for another three minutes

Apparatus: Spectrophotometer (UV-1201), cuvettes, water bath (set at 37°C), 200µl and 1000µl micropipettes and test tube

Poured deionized water into a cavity and filled it up past the clear line and inserted the cavity into the spectrometer. Calibrated the spectrometer with DI water on the program LoggerPro. Chose blue dye first and poured some into a cavity, filling it up past the clear line. Recorded results off of LoggerPro of the absorbance in consideration of the concentration of the blue dye. On LoggerPro, found the absorbance of the concentration of blue dye by looking at the peaks on the spectroscopy.

Begin by setting up the ring stand with the clay triangle and record the weight of the crucible. Take the weight of the copper chloride hydrate mass and move it to the crucible where the crucible lid is slightly off and tilted away from you. Set the burner up and make sure to not over heat the compound by moving the flame back and forth under the crucible. After heating and it has cooled observe the substance, if there is no more blue/ green color to it weigh the crucible. After weighing, move the substance to the beaker and pour in the distilled water. Stir using the glass-stirring rod to make sure the substance has completely dissolved. Clean the aluminum wire with the sand paper and wrap around your index finger then put the wire in the copper chloride solution in the beaker. Add hydrochloric acid into the mixture turning the solution clear. You can use the glass-stirring rod to remove the copper off of the wire. After rinsing off the wire, gather the copper that was formed from the reaction and transfer it to the filter paper and allow the vacuum to dry the remaining copper. Place the copper on the watch glass in the drying over for 10-15 minutes. Once the copper is dry take the weight of the copper on the watch glass and record the weight of both. Do this until there is about a 0.005 difference between the starting and the last measurement or the copper. Throw away the chemical in the correct waste container and clean the

To vary the concentrations of each reactant along with the sulphuric acid in order to observe and measure its effect on the overall rate of reaction in absorbance using colourimetry.

concentration, record the absorbance readings at a fixed wavelength, and plot the absorbance vs. concentration data. The wavelength of 520 nm was selected for experiment Part

(This experiment is aimed to use 10 Artemia, however, 7 to 13 Artemias are able to achieve the goal in this experiment.). Then seal the cuvette under water and make sure no air bubble is inside the cuvette. After that, put the cuvette into the temperature controlled water bath for ten minutes. After 10 minutes, take the cuvette to the oxygen meter to measure the oxygen concentration by holding the end of the end of the fibre-optic cable squarely on to the senor spot from the outside of the cuvette until the concentration has been shown on screen and record it down. Then return the Artemia to the same incubation bath and repeat this procedure every 5 minutes and measure it for 4 to 5 times. After the process above, we have to find out the total length of the Artemias in the cuvette. To find the total length of the Artemia, use the pipette to move the Artemia out of the cuvette and settle them into a watch glass and measure the length of the Artemias by ruler. At last but not least, put those high energy intake Artemia back into the sink and repeat the experiment instead of those low intake Artemia. On the other hand, to find the difference of activity of the high and low energy intake Artemia, those Artemia will be tracked by the software named, the Tracker and the Tracker are able to determine the velocity of the Artemia under different treatment for 5 replicates.

Carefully add all of the acid to the base in the calorimeter being careful not to splash any acid on the upper sides of the calorimeter. Stir the mixture gently with the thermometer observing the temperature every 15 seconds for the next 2 minutes. Seconds: 15s: 31, 30s: 31, 45s:31, 60s:31, 75s: 31, 90s: 31, 105s: 31, 120s: 31, 135s: 31