The first step is to calibrate the colorimeter with0.20 M Fe(NO3)3and set the absorbance at 470 nm since it is known to keep an acidic solution throughout the entirety of the experiment. It was important to do this right at the beginning of the lab since the zeroed value of the acid was the calibration number for all of the other solutions. A total of seven solutions with different dilutions were used throughout the lab to conduct the equilibrium constant. The first step was adding 5 mL of 0.200 M Fe(NO3)3to each of the 5 test tubes. Once this was done, 0.00200 M NCS was added to the test tubes, each receiving a different amount; test tube one received 1 mL NCS-and with each test tube the amount of NCS-would increase by 1 mL, test tube 5 received 5 mL of NCS. . The next step was adding HNO3 to each test tube in different volumes; Test tube one received 10 mL of HNO3 and with each test tube the amount of HNO3 decreased by 1 mL, test tube five had no HNO3 added to it. The addition of these solutions formed five test tubes of different dilutions, but of equal volume, 10 mL each. After all of the previous trials had been completed the final step was to take each test tube and pour it into a different cuvette and measure the absorbance for each. Once the initial concentration was calculated of Fe3+, NCS and FeNCS2+ in molarity. The absorbency values were recorded and used to calculate the formation constant, K f The reference table containing volumes used in each solution is provided below…
The final compound which I am going to look at is 4-aminobenzenecarboxylic acid. The compound is also known as 4-Aminobenzoic acid. The molecular and structural formula of the compound is C7H7NO2 which means that the compound consists of seven carbon atoms attached to seven hydrogen atoms along with one nitrogen atom and two carbon atoms attached as a carbon-oxygen double bond. The displayed formula for the 4-aminobenzenecarboxylic acid compound is shown and it shows the formula in a ring form therefore means that the compound is an aromatic compound. This is an aromatic compound because the compound consists of six carbons of benzene joined in a ring, having the planar geometry of a regular hexagon in which the distance between all of the C-C bonds are equal.…
TRANSCRIPTION: Transcription is the process of which DNA matches corresponding RNA bases, Transcription is located in the Nucleus, and the only type of RNA that is involved in Transcription is mRNA, and the purpose is so that the code can get out of the Nucleus, mRNA is also made through Transcription, It also takes information that doesn't directly make proteins but it helps makes codes for the production of proteins, DNA Transcription consist of 4 nucleotide bases, Adenine, Thymine, Cytosine, Guanine. Transcription also unwinds the strand of DNA and the RNA comes in and matches then becomes a single strand. The only thing that changes during this process is the Thymine gets replaced with Uracil.…
The Keq, ratio of the concentrations of product to reactant, reveals the amount of product formed depending on the number of reactant accessible. The first reaction A+B↔C+D(Keq= 3.9X10-12) favored reactant because Keq is less than 1, meaning more reactants than product is present. Thus, the reaction displays reactant(blue).This is an extreme case where the reaction does not proceed forward readily. For second reaction I+J↔K+L(Keq=8.7x10-1), reactant(blue) is favored, but shows adequate amount of product(yellow) because its Keq is closer to 1. In S+T↔U+V(Keq=5.2x1018), another extreme case, Keq is greater than 1, so less reactant is present. Consequently, the reaction is mostly complete, favoring product(yellow) side. If a reaction either reach…
In order to first perform the reaction, 1.5 mL of 4-methylcyclohexanol was added to a pre-weighed 5mL conical vial. The conical vial was then weighed to find the actual mass of 4-methylcycloheaxanol. Then, 0.4mL of 85% phosphoric acid was added to the conical vial using a plastic pipet. Six drops of concentrated sulfuric acid was then added to the vial using a glass pipet. A spin vane was then added before adding the Hickman head, water condenser and a drying tube packed with calcium chloride to the conical vial.…
Experiment 3 - Chromatography – Analyzing Analgesics by TLC and Isolation of β–Carotene by Column Chromatography…
All chemical reactions are processed through energy exchanges. Chemical reactions either absorb energy or release energy into their surroundings. In thermodynamics, endothermic reactions absorb energy where exothermic reactions release energy. In this experiment, we will be observing the chemical reactions that occur when a specific liquid is combined with a specific solid. We will measure the temperature of the liquid before the solid is added. Then we will measure the temperature of the liquid after the solid is added. We, then, will record the results, graph the temperature changes if any, and draw a conclusion whether the reaction is endothermic or exothermic reaction.…
Abstract: The purpose of this experiment is to determine the molar mass of an unknown solid. The freezing point of a solvent (Cyclohexane) was determined, and compare to the freezing point of Cyclohexane with the addition of two different concentration of unknown solid. The pure substance of Cyclohexane has defined physical properties. However, when a solute is added these properties are determined by the amount of solute added, also known as colligative properties. The temperature of the freezing point was lowered when the solid was added and it decreased as the concentration of the solid increased. The molality of the solute was determined, which was then used to calculate the molar mass of the solid for both trials. An average of the molar mass of…
1. If atomic mass of Mg atom is 24 g, find mass of 1 Mg atom.…
While performing the lab experiments in the first unit, my observation included finding the appropriate tools in the kit in order to carry out the tasks. These experiments really showed me how to differentiate the types of tools we are using and understand the differences and reason for the differences in each. Touch was a big activated sense in these experiments, the heat from boiling the water and the cold ice from the temperature labs allowed for the connection between the results and the way the temperature felt.…
The solid formed precipitation and had a color change during the reaction proving it to be a chemical change.…
The position of the equilibrium when it is heated moves to the left because there is more heat produced…
b. Place small amounts of the substance to be tested in each of the four micro test tubes.…
William C. Broshears, John J. Esteb, Jeremy Richter, and Anne M. Wilson*. (2004). Simple Epoxide Formation for the Organic Laboratory W Using Oxone. Journal of Chemical Education, 81(7), 1018-1019. Retrieved March 1, 2014, from www.JCE.DivCHED.org…
Purpose: To use indicators to test for the presence of organic compounds in certain substances.…