incorporated Beer’s Law and is focused on determining the stress that various alcohols have on biological membranes. Using five solutions of differing alcohol concentration for each of the three alcohols; methanol‚ ethanol‚ and 1-propanol and a small slice of beet‚ the stirred solution was placed into a plastic cuvette and then into a spectrophotometer and the absorbance of alcohol solutions were determined in order to conclude which alcohol and concentration of alcohol had the greatest effect on biological
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Directions Using the formula for dilutions‚ write the recipe to make 100 mL of a new solution of each solute based on having as much of the initial solution as you need. V1 M1 V2M2 SoluteFormula of SoluteInitial Concentration (M)Final Concentration (M)Recipe For 100 mL of New SolutionSodium hydroxideNaOH1.0 M0.27 M(1.0M)(VNaOH) (0.27 M)(100 mL) VNaOH 27 mL Dilute 27 mL of 1.0 M NaOH to 100 mL.Potassium permanganateKMnO41.0 M0.34 MDilute 34 mL of 1.0 M
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Beer Lambert Law experimentally. The various solutions used for this experiment are tap water mixed with food colouring‚ Introduction: The Beer Lambert Law shows the relation between absorbance of light of an object‚ the molar absorptivity‚ the concentration of the substance‚ and the distance the light travels. The Beer Lambert Law states that there is a linear relationship between the concentration of a solution and the absorbance of said solution. If there is a linear relation‚ the resulting
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resulting solution was filtered through multiple layers of cheese cloth to filter out the liquid by eliminating any large pieces in the solution. The solution created was catechol. Five different solutions were prepared as blanks with each test tube containing 6.0mL of a different pH (pH 4‚ pH6‚ pH7‚ pH8‚ pH10) of phosphate buffer‚ 1.0mL of the enzyme and 1.0mL of water. Five more solutions were prepared in the same fashion except without the 1.0mL of water. These five experimental solutions were capped
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half-cells. The glass electrode is an ion selective electrode (ISE)‚ which only responds to the hydronium ion concentration / activity in a solution under a large range of conditions. In this experiment‚ we are measuring the fluoride ion concentration‚ which means our electrode responds to fluoride ion concentrations. Procedure And Data: |Standard Solutions | |Concentration (M) |Potential (mV) | |0
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61 grams and the volume decreased by 17.3 milliliters while the mass of the cup with the tubing holding glucose solution also decreased by 1.19 grams and the volume decreased by 2.2 milliliters (Emma Ricks and Allen Hansen). The movement of water into the protein solution bag caused the mass to increase by 7.95 grams and the volume to increase by 2.4 milliliters and the glucose solution bag increased by 1.97 grams in mass and 2.2 milliliters in volume (Emma Ricks and Allen Hansen). The water had a
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2032-Ch09-homework MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In water‚ a substance that ionizes completely in solution is called a ________. A) weak electrolyte B) semiconductor C) strong electrolyte D) nonelectrolyte E) nonconductor 2) A solution with the same osmotic pressure as the blood is ________. A) isotonic to the blood B) molar to the blood C) hypotonic to the blood D) nontonic to the blood E) hypertonic to the
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increasing periods of time. - Method to test hypothesis: The hypothesis can be tested by first determining the amount of ascorbic acid needed to decolourize 3mL of DCPIP solution‚ and calculating the concentration of Vitamin C in the ascorbic acid. Next‚ determine the amount of fruit juice needed to decolourize 3mL of DCPIP solution‚ and calculating the concentration of Vitamin C in the fruit juice initially. Then‚ heat a few test tubes of fruit juice in a boiling water bath for different periods of
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------------------------------------------------- Spectrophotometry has various uses in different fields of science. It can be used in obtaining the concentration and the identity of a solution. In order to test that‚ an experiment was made using the basic concepts of spectrophotometry. This experiment used the properties of light and how much of it is absorbed by the unknown solution. In relation to this method was the so called principle‚ the Beer-Lambert’s Law‚ which was used in getting the relationship of the absorbance and the
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This is termed the hydrotropic effect. Examples of hydrotropic salts include ETH maleate‚ succinate‚ and oxalate2. The hydrotropic effect is achieved by adding an organic salt which will increase the saturation solubility of a drug in an aqueous solution by increasing hydrogen bonding. The mechanism of hydrotropism involves weak interactions between the hydrotropic agent and the insoluble drug. This method closely resembles complexation. Commonly used hydrotropic substances include caffeine‚ sorbitol
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