The results showed that the flatworms moved faster away from light toward darkness when it treated with caffeine. In contrast‚ it moved slower away from light toward darkness when it treated with ethanol. For the first specimen‚ flatworm 1(Fredrick)‚ treated with water used as a control‚ then with 0.5 % EtOH and 1% EtOH. The speed was decreasing as the trials were repeated for each different concentration compared to the control trials of water was increasing. Higher concentration of EtOH caused
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bromophenol blue and methyl orange by using spectrophotometer. Spectrophotometer is a device that measures the absorption of radiation at a particular wavelength. In experiment two‚ the purpose was to investigate the relation between concentration of the solution and its absorbance at the (λmax) obtained from experiment one for each dye. Beer’s Law states that concentration of a substance is directly proportional to its amount of light absorption (Department of Biology‚ 2008). The number of molecules of
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Lab – Solubility Curve for Potassium Nitrate I. Purpose: To plot a solubility curve for potassium nitrate in aqueous solution. II. Safety: Wear eye protection throughout the experiment. Be cautious of hot water. Wash hands if you come into contact with potassium nitrate. III. Procedure: 1. Carefully weigh out your assigned mass of potassium nitrate on a piece of weigh paper. Carefully pour the sample into the large test tube. 2. Add 20. mL of distilled water to the tube.
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for application in the dry state directly to the seed. DT Tablet for direct appli- Formulation in the form of tablets to be applied individually cation and directly in the field‚ and/or bodies of water‚ without preparation of a spraying solution or dispersion. EC Emulsifiable concentrate A liquid‚ homogeneous formulation to be applied as an emulsion after dilution in water. EG Emulsifiable granule A granular formulation‚ which may contain water-insoluble formulants‚ to
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the entire mix since it is not homogeneous. 2) Pour the solution into a separatory funnel. 3) To extract the nicotinamide from the mixture‚ add 5 mL of 5% HCl and shake gently. Draw off the lower aqueous layer into 125 mL Erlenmeyer flask and repeat the extraction with a second portion of HCl. Combine the three extracts and then set this mixture aside. 4) To separate the trans-cinnamic acid from the mixture‚ extract the ether solution twice with 5 mL of 5% sodium bicarbonate. Combine the extracts
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ACKNOWLEDGEMENT First of all‚ we would like to say thanks to God‚ for giving me the strength and health to do this project work until it done. Not forgotten to our family for providing everything‚ such as money‚ to buy anything that are related to this project work and their advise‚ which is the most needed for this project‚ Internet‚ books‚ computers and all that as our source to complete this project. They also supported us and encouraged us to complete this task so that we will not procrastinate
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4. Both weighed plate were clipped using crocodile clips and the batteries were placed in the battery socket. After that‚ both plates were immersed in copper (II) solution and the stop watch was started to allow the apparatus to run for 30 minutes.5. the reading of ammeter was recorded. Then‚ both plates were taken out from the solution‚ and
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Objective: To observe the effects of osmosis on eggs placed in vinegar (5% acetic acid)‚ syrup (60% sugar solution)‚ and water (100% distilled). Hypothesis: Hypothesis #1: It was hypothesised that the egg would gain 59 grams of mass after soaking in vinegar for 24 hours. Hypothesis #2: It was hypothesised that the egg would become larger when soaked in syrup than it once was due to the hypotonic environment. Hypothesis #3: It was hypothesised that the egg would soak in water for 72 hours‚ losing
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Macroscopic Evaluation of Wound The day when the wounds were created was designated as day 0‚ and the process of wound healing was observed daily from day 0 to day 14. Before observation‚ the environment surrounding the wounds was cleaned with saline solution. Wound edges were traced on polypropylene sheets and photographs were taken every day. The traces on the sheets were captured with a scanner onto a personal computer using Adobe Photoshop Elements 7.0 and the areas of the wounds were calculated using
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Molarity of these samples was also calculated to determine concentration and percent error rate. Students also analyzed the concentration of blue dye #1 to determine the concentration of blue dye #1 in a commercial blue dye drink. Procedure: To drop solutions into the test tubes and then determine the Beer’s Law relationship of each and the calculations of each of part of the experiment. Convert %T to absorbance and prepare a Beer’s Law plot using this data. 1. Concentration of Various Samples Sample
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