Task 3 For part of this task‚ I gathered information from a technician that works in the science department. This enabled me to gather primary information‚ giving me a basic understanding of the storage and practices within the lab before researching them on the internet. Chemical store management When storing chemicals‚ they are put into different categories‚ for example; flammables‚ corrosives‚ irritants etc. All of these different categories are stored in an external store. They are stored externally
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the results of the intensity of the color and the absorbance of the liquids with the different solvents. Solvent Results from colorimeter 0.001 Acid (Hydrochloric) 0.358 Ethanol 0.132 Hot water 0.984 Cold water-distilled water (control) 0.057 CONLUSION: The results show that hot water gave the highest average absorbance reading from the colorimeter‚ followed by hydrochloric acid‚ ethanol and cold water‚ in descending order of absorbance. The absorbance of the solvent that was
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changed during the reaction. The concentration of crystal violet will be of 4×10-5 M and the concentration of sodium hydroxide will be of 0.20 M. ASPECT 3: developing a method of obtaining data Materials: * 1 water bath * 1 Vernier colorimeter * 90mL of 0.20M Sodium Hydroxide * 90mL of 4×10-5M of Crystal Violet * 2‚ 125mL (± 5ml) beakers * 2‚ 50mL (± 5ml) beakers * 2 measuring cylinders‚ 10mL (±0.5ml) * 1 Thermometer (±1 °C) * Ice * Hot water Safety
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Distance from light/mm | Colorimeter reading/arbitrary units | | Algal balls solution | Hydrogen carbonate solution | | 1 | 2 | mean | 1 | 2 | mean | 0 | 0.52 | 0.52 | 0.52 | 0.50 | 0.50 | 0.50 | 250 | 0.52 | 0.45 | 0.49 | 0.59 | 0.63 | 0.61 | 500 | 0.50 | 0.49 | 0.50 | 0.52 | 0.55 | 0.54 | 750 | 0.47 | 0.55 | 0.51 | 0.54 | 0.53 | 0.54 | 1000 | 0.58 | 0.56 | 0.57 | 0.52 | 0.54 | 0.53 | Results Results The results do not show the general relationship between light intensity and
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3/4/14 Determining The Formula of a Complex Ion Luqman Khan Contents: Aim………………………………………………………………………………………………………………….……2 Results……………………………………………………………………………………….………………………2-6 - Raw Data………………………….………….……………………………………………………..…..2 - Qualitative Analysis………………………………………………………………………………….2 - Data Processing……………………………..……………………………………………………..3-5 - Graphical Results……………………………..…………………………………………….…….5-6 Conclusion…………………………………………………………………………………………………………6-7 Evaluation……………………………………………………………………………………………………………
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An Experiment to Test the Effect of Temperature on the Rate of Photosynthesis in Green Algae Background Photosynthesis is an amazing process where plants are able to create their own food as well as oxygen using sunlight‚ carbon dioxide (co2)‚ and water. The part of the plant responsible for photosynthesis is the enzymes in the chlorophyll (structures that carry out photosynthesis located in leaves). Photosynthesis is the process of creating glucose. Water + Carbon Dioxide + Sunlight = Glucose
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pH 8 where there is a steep increase from 30% to 39% as the enzyme has reached its optimum pH at 8. During the experiment in the boiling tube this pH had the deepest red colour as the most protein gelatine was broken up. This meant that in the colorimeter when testing to see what the light transmission‚ this pH let the least light through. For this enzyme as the pH increases the percentage of light transmission decreases until it gets to pH 8 where it increases again to 39%. From the graph the
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5cm³ of distilled water‚ one in each of the water baths to bring them to the required temperature. Place a beetroot section in each boiling tube and leave for 30 minutes. Set up the colorimeter for 490 nm light absorption‚ and 2/3rds fill cuvettes with water from each of the 8 boiling tubes. Calibrate the colorimeter and put in the cuvettes‚ taking care to place them so the light passes through the smooth sides‚ and record the readings. Repeate the readings for all 8 temperatures to check results
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Biology IA: Quantitative Estimation of Sugars to Soft Drinks Trials Data Collection and Processing: Percentage Transmissions of Light through a Glucose Solution after a Benedicts Treatment | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | Trial 6 | Trial 7 | | Glucose Concentration | Transmission (%)± 0.1 | Transmission (%)± 0.1 | Transmission (%)±0.1 | Transmission (%)± 0.1 | Transmission(%)±0.1 | Transmission (%)±0.1 | Mean (anomalous data not included) ±0.1 | Standard Deviation
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5vol (0.42moldm-3) hydrogen peroxide (H2O2). For the second part of my investigation‚ the KI solution will remain a constant 0.3moldm-3 and the H2O2 solution will vary. H2O2 + 2I- + 2H+ -> 2H2O + I2 Methods to find the rate: 1 - Use a colorimeter to monitor the change in absorbance as the reaction progresses‚ showing how the concentration of Iodine changes with time and how varying concentrations of KI and H2O2 solutions affects the rate of reaction. 2 - Use an iodine clock: add 2cm3 of
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