WHY DOES THE COLOUR LEAK OUT OF COOKED BEETROOT? PLAN Hypothesis Temperature has an effect on the leaking of the colour from beetroot. This means that as the temperature is altered there will be a change in the rate of colour leakage. Scientific Background Beetroot is a very familiar vegetable and is commonly known as beet. It is famous in most recipe books that advice that its outer skin is not to be removed to avoid getting red dye in the cooking water. If we look at the internal structure
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Study of the first element – Hydrogen. Answer the following questions:- 1. Give a reason why hydrogen can be placed in group 1[IA] and group 17[vIIA] of the periodic table. 2. What similarities does it show with group 1[IA] and group 17[VIIA]. With special reference to valency electrons and ion formaton and examples. 3. How does hydrogen occur in the free and combined state? 4. Which metals react with cold‚steam and boiling water to form their respected oxides and hydroxides ? Give examples and
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December 2012 1. Title and Author 1. The Effect of Extreme Temperatures on the Rate of Photosynthesis 2. Jeffrey Xia 2. Abstract A previous lab in which we conducted‚ tested whether or not the light intensity had an effect on the rate of photosynthesis. We concluded that light intensity did possess an effect on the rate of photosynthesis – the closer the experimental plant units were to the light source‚ the more experimental plant units exhibited the effect of gas exchange in photosynthesis.
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thermal decomposition of CaCO3 at different temperatures. Research Question How does temperature influence the rate of thermal decomposition in CaCO3? Hypothesis Every time more heat is added to the element‚ CaCO3‚ thermal decomposition will take place faster because the heat is a catalyst which speeds up the reaction. Variables Dependent Variables → Mass of Calcium Carbonate Independent Variables → Temperature Controlled Variables → Calcium Carbonate What? How? Why? IV Temperature
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process can be affected by several variables; one of the most notable variables is the temperature of the plant’s environment. Previous study has led me to conclude that when the temperature of the plants’ environment is low‚ the rate of photosynthesis is also low because the enzymes responsible for photosynthesis are not able to absorb as much heat energy and in turn will move slower. In contrast‚ if the temperature of the plant’s environment increases‚ the rate of photosynthesis will also increase
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Lab Report The effect of temperature on the reaction between Catalase and H2O2 Sarah AlShemesi In this experiment we’ll be exploring the effects of temperature on the reaction between Catalase and H2O2.We’ll be using five different temperatures to test this. The five different temperatures will be 10‚ 30‚ 50‚ 70 and 90 oC. We will use the liver as a source of Catalase. A 1 gram piece of liver will be inserted into a test tube with 2 cm3 of water‚ then 2 cm3 of H2O2 will be added. The Catalase
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Factors Affecting the rate of Hydrogen Peroxide degradation using Catalase Introduction An enzyme is a globular protein which functions as a catalyst that speeds up the rate of a reaction without being consumed in the reaction. An enzyme-catalyzed reaction occurs when a substance called the substrate binds onto the active site of the enzyme. This joining allows for a reduction in the activation energy and the reduction in activation energy helps the reaction to occur at a quicker rate. Enzyme
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Tris(acetylacetonato)manganese Dissolve 0.26 g manganese(II) chloride tetrahydrate and 0.68 g of sodium acetate in 10 mL of distilled water. Add 1 g acetylacetone and swirl the mixture. With magnetic stirring‚ add dropwise a solution of 0.052 g potassium permanganate in 2.5 mL of distilled water over a period of 10-15 minutes. Stir for 10 minutes‚ then add dropwise a solution of 0.63 g sodium acetate in 2.5 mL distilled water. Heat the resulting mixture on a hot plate to between 60 and 70oC for
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concentrations of hydrogen peroxide would affect the activity of catalase? 1. Variables Independent Concentration of hydrogen peroxide Dependent Volume of oxygen gas evolved Control Amount of liver used Location of liver sample obtained from the liver Type of liver used Possible enzymes transferred from hands during making liver homogenate Deterioration of liver Endpoint identification Volume of hydrogen peroxide added Reading on the syringe Room temperature 2. Hypothesis
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electrons to the empty pi star orbitals of C atom. This has significant effect on C=O strength hence low energy absorption. Preparation of- Manganese(III) tris(acetylacetonate) Abstract In this experiment Manganese (III) tris (acetylacetonate) - [MnIII(acac)3] is prepared using manganese chloride‚ sodium acetate and acetylacetone‚ further analysis were done to find the percentage of manganese in complex. Introduction Manganese is a first row transition metal that has a range of oxidation states
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