Bleaching Of Blue Lab Report

The concentrations and absorbances of the red and blue dyes were used to find the concentration of the purple dyes. From the graph of the blue dye, the linear equation for absorbance was y = mx + b. From that formula came the equation y = 7.915 x 104 (x) + 0.02489, where y represents absorbance, m is slope, x is concentration/molarity, and b is the constant/y-intercept. The same set up was performed for the red dye, but the equation produced was y = 1.045 x 104 (x) +.001298. The equations found when graphing absorbance vs. concentration were used to find the concentration of the purple dyes. The absorbance for purple dye 3 on the red wavelength of 470 nm equaled 0.149 and 0.818 for the blue wavelength of 635 nm. For purple dye 1

When combined Sodium Bicarbonate and Hydrochloric Acid, Carbon Dioxide is produced. The two chemicals do not undergo a change in color but a chemical change when CO2 is produced.

In this experiment, the amount of sodium hypochlorite in a commercial bleach will be determined by reacting it with sodium thiosulfate in the presence of iodide ions and starch. A solution of sodium thiosulfate of known concentration will be added to the bleach using a buret in a titration procedure. The disappearance of the dark blue color of the starch-iodine complex will signal the end point.

When the concentrations were changed so did the rate of reaction. When the concentration was changed to 0.265M the rate of reaction dropped by a factor of 0.5 (50%) below the control value. Furthermore when 60mL of water was added to the bleach dropping the concentration too 0.132M the rate dropped by a factor of 0.7 (70%).

After 7 trials of chromatography in a 2% isopropyl alcohol solution, blue dye #5 had an average rate of flow of .948. Red dye #40 had an average rate of flow of .781, and yellow dye #1 had an average rate of flow of .884. After 7 trials of chromatography in a 2% sodium chloride solution, blue dye #5 had an average rate of flow of .743. Red dye #40 had an average rate of flow of .20, and yellow dye #1 had an average rate of flow of .387.

If bleach is used compared to the other detergents, then bleach will work best because it has the most whitening agent. The experiment will work around this hypothesis in hopes of proving it right using both the background knowledge and the experimental data. In the experiment bleach will be applied to 5 shirts along with tide, gain, oxy-clean, and arm and hammer in varying washes to see which detergents remove the stain applied by grape juice the best. *Note only

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

Introduction: The rate expression for this reaction is of the form: rate = K(CV+)M(OH-)N Where k = re constant, m is the order of the reaction with respect to the concentration of CV+, and n is the order of the reaction with respect of OH-. In the experiment the concentration of OH- is purposely made 1000 times larger then Concentration of CV+. Thus, the concentration of OH- changes so little during the

The values of color absorbance are effective because color absorbance has a linear relationship with concentration values, which in turn, allows us to easily find concentration values for many solutions. Beer’s law describes this phenomenon since the absorbance is directly proportional to concentration. We observed that as the color absorbance increased, the concentration of the FeSCN2+ complex ion increased. This is because as the FeSCN2+ concentration increases, the blood-red color becomes darker due to more presence of the blood-red FeSCN2+ ion. Therefore, the color absorbance increases because there is more blue color absorbed by the darker red color. We then graphed the absorbance and concentration values and created a line of best fit. Using the line of best fit, we were able to predict the equilibrium concentrations of the FeSCN2+ solutions and find the change required to reach equilibrium. Since we already knew the initial concentration of FeSCN2+ and since we already found the equilibrium concentration of FeSCN2+, we can calculate the change in equilibrium. Using this data, we were able to calculate the equilibrium concentration of all of the species in this lab, since we already knew the change from the initial concentration to the equilibrium change. Q is less than K because there was no initial concentration of FeSCN2+, but after the system reached

The purpose of this experiment was studying the reaction rate of crystal violet with NaOH by observing the concentration using the MicroLAB colorimeter, monitoring how the reactant concentration affects reaction rate constant, determining the reaction order, and to calculate the reaction pseudo rate constants and the true value rate constant. The rate of the reaction of crystal violet with NaOH is given by the generalized rate law, rate = k [OH-]x [CV]y where k is the rate constant for crystal violet and CV is crystal violet, C25H30N3+. Where x and y are the reaction orders. The equation can be rewritten as:

The dyes in the laboratory experiment are made of numerous colors, mainly red and blue, the spectra from each of the dyes corresponded to the wavelengths obtained from each of dye i.e. 620 nm for red and 450 nm for blue.

In this experiment we tested the effects that enzymes and substrate have on chemical reaction rates, which is the rate at which chemical reactions occur.. This experiment tested how different concentrations of enzyme and substrate affected the light absorption measurements on a spectrophotometer. The experiment also tested how temperature affected the light absorption, and in a separate test, the effect of the enzyme inhibitor hydroxylamine was also tested. In the first test conducted, 3 different concentrations of enzyme, and three different concentrations of substrate were measured in a spectrophotometer. For the enzyme and the substrate, the measurements got higher as the concentrations were higher, but the over measurements of the substrate were smaller than those of the enzyme. In the second test conducted, the medium concentration enzyme was tested under the temperatures; 4°C, 23°C, 37°C, and 60°C. The measurements in this test got higher as the temperature got higher, but did the measurements under 4°C were overall significantly higher than the other temperature measurements. Lastly, the last test conducted showed that the measurements of the substance with 0 and 1 drop of hydroxylamine inhibitor went up, but the measurements of the enzyme with 5 drops of hydroxylamine inhibitor stayed rather low and did not change much. In conclusion, these experiments showed that chemical reaction rates are sped up with higher concentrations of enzyme, substrate,

Abstract: This experiment helps determine the rate of reaction of crystal violet while it reacts with sodium hydroxide with respect to crystal violet. The amount of sodium hydroxide is varied in this experiment while crystal violet is kept at a constant. The transmittance of crystal violet is observed and recorded using a colorimeter and the data obtained is used to plot graphs which are manipulated using LoggerPro software to produce the desired outcome; rate of reaction of crystal violet. Upon completion of the experiment it was seen that the rate of reaction of crystal violet turned out to be 1

This leads me to the argument that there is a relationship between concentration and absorbance that will enable me to determine the concentration of a solution through the measurement of the color change in a reaction tube (Bio 5LA- Lab # 5, pp.3). It is evident, that the relationship between concentration, reaction rate, color change, and absorbance plays an important role in demonstrating that the reaction rate, goes hand in hand with concentration. Ultimately, their relationship will directly affect the reaction rate of an enzyme-catalyzed reaction (Maslov, Dmitri).

In this paper, an artificial food dye will be made to mimic the color of Full Throttle. To determine what food dye are needed, Full Throttle will be put through a spectrometer to determine what wavelengths are absorbed. Specific wavelengths absorbed will correspond to specific colors absorbed. It was determined that yellow 5 and yellow 6 will be used to make our artificial food dye to mimic Full Throttle. Using Beer’s Law, it was determined that a concentration of 0.0000236 moles of Yellow 5 and a concentration of 0.0001494 moles of yellow 6. Using our line of best fit from the absorption graphs, it was determined