Procion Red Dye Lab Report

A milk-based, litmus broth tube is incubated and observed after 48 hours. Observations include lactose fermentation without gas as well as with gas, the reduction of litmus, casein protein coagulation and casein and protein hydrolysis. These characteristics were all determined based on the color of the solution and the production of a curd, the curds density and the production of a gas. To determine the density of the curd, the tube was slightly turned to see rather or not it was mobile or concentrated towards the bottom.

The objective of this study was to test the phototactic response of Daphnia when exposed to red (>600 nm) and white light. A 30 x 2 cm clear acrylic mesocosms with a 10 cm counting area was filled with distilled water and 10 Daphnia. We counted the number of Daphnia that traveled to the lit counting area after 10 minutes. There were twice as many Daphnia in the lit counting area for the control (white light) compared to the experimental group (red light). The results showed that red light had a negative effect on the phototaxis of Daphnia.

In the experiment, the problem was the contaminants that were affecting the quality of the water samples. To fix this issue, three scientists had to determine the contaminants that were present in the samples. One sample was from the school sink and the second sample was from an unknown source. The scientists conducted many tests to figure out what pollutants were present in the water. In the experiment they used probes to test for pH, dissolved oxygen, total dissolved solids, conductivity, and turbidity. The probes hook up to the computer and collected the averages for each test. They collected this data and used it for later evaluation of the contaminates. They also tested for iron, copper, and chlorine with different tablets.

To begin the lab 40 mL of Phenol red were obtained in a beaker, and 40 mL of water were obtained in a separate beaker. Next one plastic baggie was

Photograph Description: Photograph 1, shown on the previous page, was taken after 20 drops of the crystal violet dye was added to the solution, and photograph 2 was taken after 40 drops were added. As seen in the pictures, only a faint ring of violet was visible around the coacervates. Photographs 3-5 were taken after adding a drop of 20% concentration crystal violet dye onto the side of a slide.

The Rf value describes the strength of the intermolecular bonds between the solute and the solvent.

The purpose of this experiment was to analyze the amount of green plants versus albino plants that were created in the F2 generation. The results of this lab would allow the scientist to either support or reject the accuracy of the punnett square probability. The probability of the punnett square is that about 3/4 of the plants would be green and 1/4 would be albino. The purpose of this experiment is to investigate the passing of genes from parents to offspring.

Describe what happened to the original spot of plant pigment extract? The spot traveled from the faint line on at the tip of the chromatography paper and it then created bands of colors. The original color of the plant extract was a black color and the once it was immersed in developer four it then started to travel up the paper strip.

Based on our results, sunset yellow had a smaller maximum wavelength than allura red, which means that allura red was able to absorb more light than the sunset yellow dye. When bleach was added to each dilution of dye, the allura red’s half-life was 3 minutes and 20 seconds while the sunset yellow’s half-life was 5 minutes and 15 seconds. We cannot make a justified conclusion on our results because the sunset yellow’s reaction had several errors

The materials for the lab included: Sodium bicarbonate, acetic acid, large Erlenmeyer flask, balloon, small graduated cylinder, and an electric balance. The second step of the first experiment was to measure 10 mL of acetic acid in the graduated cylinder. Next, measure half a spoonful of sodium bicarbonate. To weigh the sodium bicarbonate it was placed in the flask and weighed, using the electronic balance. The weight of the sodium bicarbonate was recorded in a data table. After the sodium bicarbonate was weighed the acetic acid(inside the graduated cylinder) was weighed on the electric balance. The weight of the acetic acid was recorded in a data table as well. The acetic acid was then poured into the flask with the sodium bicarbonate. The balloon was used to quickly cover the opening of the flask, in order to prevent the gas from leaking. The product was weighed and compared to the weight of the

Drapex 6.8, supplied by Galata Chemicals from Louisiana, was the ESO used. Boron trifluoride diethyl etherate, dimethyl benzyl amine, hexanoic anhydride (97%), n-hexanoic acid (99%) and n-octanoic acid (99%) were obtained from Sigma-Aldrich, USA, while sodium chloride and sodium bicarbonate were obtained from Fisher Scientific, USA and used as received. The AMC-2 catalyst was purchased from Aerojet Chemicals, California, US. Epon 828 (epoxy equivalent weight, EEW 185-192 g/eq. Hexion technical data sheet of Epon 828 issued September 2005) and Epon 1001F (EEW 525-550 g/eq. Hexion technical data sheet of Epon 1001F issued September 2005) epoxy resins, containing diglycidyl ether of bisphenol A and oligomers were purchased from Miller Stephenson,

For the chromatographic separation of plant pigments, pieces of spinach were ground with acetone to produce a watery extract. A line of extract was applied 1 cm from the bottom of a strip of chromatography paper. The line dried and the extract was reapplied. Once that dried, the paper was placed into a jar containing a small amount chromatography solvent (small enough that the line was not drowned by the solvent) which is made of 1 part acetone and 9 parts petroleum ether. The lid was placed on the jar and was only removed once the pigments had separated and the solvent had almost reached the top. The distance travelled from the original line or extract to the separated pigments was then measured and recorded on a table

In Section A, the average mass of the 50 ml beaker was weighed 3 times using 2 different electronic balances. The final average mass recorded was 33.73g. The volume of distilled water needed was calculated from the mass of water using the density= 0.9971g/mL in Section B. The volume of water needed was transferred using pipette, graduated cylinder and Erlenmeyer flask respectively. In Section C, a pipette was calibrated by measuring the water temperature and the density was determined. The average mass of water was calculated and the reading was 20.68g. The value for the relative average deviation was 5.33%. In Section D, the crucible, crucible lid and anhydrous magnesium sulphate were weighed and the % water in magnesium sulphate hydrate was recorded calculated which is 41.56%.

Making dyes out of these substance is relatively easy. All you usually need to do is boil some in a pot of water for about 10-15

Adsorption is one of the major process used for the removal of Cr(VI) worldwide because it is inexpensive, widely applicable, efficient and creates little amount of sludge(Kannan and Rengasamy, 2005). Chromium can be removed using adsorbents of natural as well as chemical origin. However, these bio-adsorbents have various disadvantages like waste may itself contain various toxicants and subsequently increase the organic content of water. Studies have showed adsorption capacities and applicability for some low-cost materials, among others like alluminium oxide, chitosan, bentonite, saw dust and waste slurry (Dubey and Gopal, 2007). Activated carbon is an effective inexpensive adsorbent which has use in various industries to purify water (D Mohan and Chander, 2001; Yoshihara et al.,2007; Yin et al., 2007). Activated charcoal possesses large surface area and number of micropores that make it a suitable for application as adsorbent for environmental pollutants. In commercial scale they are considered as good absorber for the removal of the