Christy Chan (5) BIOLOGY LAB REPORT Investigation of the effect of metal ions on enzyme activity Objective To study the effect of two heavy metal ions‚ lead (II) ions and silver ions on the enzyme activity of invertase. Introduction Hypothesis: The rate of enzyme reaction of invertase decreases and the reaction eventually stops as the heavy metal ions inhibit the enzyme reactions. Biological principle: Heavy metal ions are non-competitive inhibitors. They do not compete with the substrates
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you observed in the experiment and answer these questions: A. Which way should the equilibrium shift when HCl is added? How do your results support your answer? It should shift to the left because adding any component causes the equilibrium to shift to the opposite side. B. Which way should the equilibrium shift when Na2EDTA is added? How do your results support your answer? It should shift to the right because the removal of a component causes the equilibrium to shift to the side from
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D-block ions and the kinetics of reactions iodine clock reaction: By Stephen Parsons 6K2 Centre number: 61813 Candidate number: 8270 Table of Contents My aim and my reaction: 3 Rate of reaction: 4 Activation enthalpy: 5 Collision theory: 6 The effect of temperature on reaction rate: 7 The effect of concentration on reaction rate: 7 The effect of a catalyst on reaction rate: 8 D-block elements: 9 The effect of extra kinetic energy (from stirring etc.): 10 Where do we use D-block ion catalysts
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Senior Secondary School and Junior College Mandaveli Chennai – 600028 A CHEMISTRY PROJECT “STUDY OF THE OXALATE ION CONTENT IN GUAVA FRUIT” Submitted in the partial Fulfilment of the requirement for AISSCE 2010-2011 By Abdud Dayan Adeeb Of Class XII C St. John’s Senior Secondary School and Junior College Mandaveli Chennai – 600028 A CHEMISTRY PROJECT “STUDY OF THE OXALATE ION CONTENT IN GUAVA FRUIT” Submitted in the partial Fulfilment of the requirement for AISSCE 2010-2011 By Jagadeesh
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Abstract: Diarrhea usually develops suddenly and may last from several hours to a few days. It is often accompanied by abdominal pains‚ low fever‚ nausea and vomiting. Diarrhea is a common symptoms of “gastrointestinal”. This investigatory project shows that we can produce diarrhea medicine without spending much money‚ time and effort. This investigatory help to save the money of patient suffering from diarrhea instead of buying expensive commercialized medicine. It has no side effects because
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Precipitates are electrically uncharged. In this experiment all of the precipitates result from the exchange of positive and negative ions between reacting solutions of two ionic compounds. Thus‚ in this example the precipitate must be either silver chloride‚ AgCl or sodium nitrate‚ NaNO3. Sodium nitrate dissolves readily in water and is therefore soluble. Thus we can conclude that silver chloride is the insoluble precipitate. We can represent the formation of this precipitate by a net ionic equation:
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HYDROGEN BONDING: Hydrogen bonding is a bonding type consisting of dipole and dispersion forces. A hydrogen bond is the attractive force between a hydrogen atom attached to a molecule and an atom of a different molecule. According to the Pauling scale of electro-negativities of the elements‚ it can be viewed that the three most electronegative elements in the periodical table are nitrogen‚ oxygen and fluorine. These are also called heteroatoms. The heteroatoms have a partial negative charge while
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Aims The aims of this investigation are: 1. To find the rate equation of the reaction of hydrogen peroxide and iodide ions. This will be achieved by using an iodine clock method and colorimetric analysis. 2. Draw a graph of rate against concentration for each reactant (Hydrogen peroxide‚ potassium iodide and H+ ions). 3. Finding the order for each reactant 4. Finding the rate-determining step. 5. Proposing a mechanism for the reaction. 6. Using Arrhenius’ equation to find the activation
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It would be difficult to be sensory challenged whether it was a visual or a hearing disturbance. However‚ I feel for me personally that having a visual disturbance would be more challenging‚ especially if I could not see at all as with blindness. Being a person that has worn glasses for the last 30 years‚ I understand a bit about visual disturbance. I cannot get out of bed in the morning without my glasses or I have a difficult time seeing‚ if I had to go through life like that I would have a tough
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(by mass) forming the planet Earth as a whole‚ forming much of Earth’s outer and inner core. It is the fourth most common element in the Earth’s crust. Iron’s very common presence in rocky planets like Earth is due to its abundant production as a result of fusion in high-mass stars‚ Like other group 8 elements‚ iron exists in a wide range of oxidation states‚ −2 to +8‚ although +2 and +3 are the most common. Elemental iron occurs in meteoroids and other low oxygen environments‚ but is reactive
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