can be found in everyday products. For example‚ the light omitted by fireflies‚ deep sea fish and glow sticks is a result of this process. Luminol was synthesized from from 3-nitrophthalic acid and then combined with potassium ferricyanide and hydrogen peroxide to omit a blue light. The product of this reaction is very unstable and is made by losing a nitrogen and the electrons go from an excited state to ground state and energy emitting as a photon creating the blue light. Introduction: Chemiluminescence
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Graduated cylinder Hydrogen peroxide Procedure: 1. Place all 5 glass tubes face up in the drying rack 2. Use tweezers and soak one potato cube into water and leave it there for 2 minutes. 3. After 2 minutes‚ use tweezers and place the potato into the first testing tube. 4. Repeat steps 2 and 3 four more times except soaking the other 4 potatoes in baking soda solution‚ bleach‚ vinegar‚ and lemon juice. Place the potatoes in each tube respectively. 5. Pour hydrogen peroxide into the 50 ml glass
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Purpose: In this experiment‚ the purpose was to have found out how different chemical solutions help or harm radish plant growth when the seeds of the radish plant are soaked in said solutions prior to planting. Background: The IRP project I am doing is based off the subject of seed germination. The seeds I will be planting are cherry belle radish seeds‚ freshly bought. Instead of planting the seeds in soil like it is normally done‚ the plant seeds will be placed on paper towels to grow for better
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Title: Enzyme Activity Lab Purpose: To measure the rate of enzyme activity from a tissue abstract and experiment with different factors‚ such as the enzyme solution and the substrate with different hydrogen peroxide percentages and temperature‚ that affect enzyme activity. Hypothesis: 1) If the disk is placed into each beaker with 100 units/ml of enzyme solution‚ then the time for the disk to float will be 30 seconds. 2) If the temperature of the solution is at 5 degrees Celsius‚
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Avocado 2. Petri Dish 3. Hydrogen Peroxide 4. Vinegar 5. Vinegar Substrate Procedure 1. Place a small piece of cooked avocado/avocado/soaked avocado in a Petri dish. 2. Place 10 drops of hydrogen peroxide/vinegar substrate on the avocado 3. Observe for enzyme activity by looking for bubbles 4. Rate the amount of oxygen bubbles produced on a scale of 1-5 5. Record your data in the chart Data Conclusion After placing 10 drops of hydrogen peroxide and vinegar substrate in the
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T1 (Hydrogen Peroxide)‚ T2 (Betadine)‚ T3 (Plain Normal Saline Solution)‚ T4 (Betadine+Hydrogen Peroxide). An abrasion wound was applied to the mice and treated with topical agents daily. The decrease in wound size (cm) were measured daily for a period of 10 days and the data gathered were subjected to statistical analysis. At the end of the 10-day experiment period‚ T3 (Plain Normal Saline Solution) promoted the fastest decrease in wound size (cm) followed by T1 (Hydrogen Peroxide)‚ T2 (Betadine)
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in INK – pencil or white-out will render the work ineligible for mark appeal) 1. What observations and conclusions can you note about each of the three reactions that occurred in the test tubes where you combined potassium iodide‚ KI‚ and hydrogen peroxide‚ H2O2 (in part 1) of the experiment? (Give a detailed explanation of any observations that you made‚ i.e.‚ what made the colour change‚ what reactions happened?) ANSWER: 2. Use the information below to develop the necessary calculations
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for disinfection of inanimate objects‚ including instruments and furniture surfaces. Commonly used antiseptics for skin cleaning include benzalkonium chloride‚ chlorhexidine‚ hexachlorophine‚ iodine compounds‚ mercury compounds‚ alcohol and hydrogen peroxide. Other agents which have been used for this purpose‚ but have largely been supplanted by more effective or safer agents‚ include boric acid and volatile oils such as methyl salicylate (oil of wintergreen.) Chlorhexidine shows a high margin of
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Iodine clock reaction This is the hydrogen peroxide/ potassium iodide ‘clock’ reaction. A solution of hydrogen peroxide is mixed with one containing potassium iodide‚ starch and sodium thiosulfate. After a few seconds the colourless mixture suddenly turns dark blue. This is one of a number of reactions loosely called the iodine clock. It can be used as an introduction to experiments on rates / kinetics. 63 Lesson organisation This demonstration can be used at secondary level as an introduction
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see how pH affects the activity of potato tissue catalase‚ during the decomposition of hydrogen peroxide to produce water and oxygen. Catalase + 2H2O2 Catalase + 2H2O +O2 Catalase + Hydrogen Peroxide Catalase + Water + Oxygen Independent Variable The independent variable in this investigation is pH. Each individual enzyme has it’s own pH characteristic. This is because the hydrogen and ionic bonds between –NH2 and –COOH groups of the polypeptides that make up the enzyme
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