(Starch) when adding the three drops of Iodine to each tube observe the color change. When performing this test the chemical with the larger amount of iodine will be identified. The larger the amount of iodine in the chemical will result in a purple/black color. The iodine/starch complex has energy level spacings that are just for absorbing visible light-giving the complex its intense purple/black color. The method to be used‚ consist of three drops of iodine in the chemical filled tube that is to
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Kinetic theory (or the kinetic or kinetic-molecular theory of gases) is the theory that HYPERLINK http//en.wikipedia.org/wiki/Gasgases are made up of a large number of small particles (HYPERLINK http//en.wikipedia.org/wiki/Atomatoms or HYPERLINK http//en.wikipedia.org/wiki/Moleculemolecules)‚ all of which are in constant‚ HYPERLINK http//en.wikipedia.org/wiki/Randomnessrandom HYPERLINK http//en.wikipedia.org/wiki/Motion_(physics)motion. The rapidly moving particles constantly collide with each other
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KINETIC ENERGY Objects have energy because of their motion; this energy is called kinetic energy. Kinetic energy of the objects having mass m and velocity v can be calculated with the formula given below; K=1/2mv² Kinetic energy is a scalar quantity; it does not have a direction. Unlike velocity‚ acceleration‚ force‚ and momentum‚ the kinetic energy of an object is completely described by magnitude alone. Like work and potential energy‚ the standard metric unit of measurement for kinetic energy
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occurred in 1931. The electron microscope is used to see molecular levels of the cell that cannot be seen by the naked eye. This has helped us drastically improve our understanding of cells. 5. The discovery of the mechanisms of light-independent reactions of photosynthesis was discovered in 1953. This discovery helps us in understanding how plants work‚ and how they get energy from light. 6. The DNA structure was first discovered in 1953. This discovery has lead us to understand more about
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Iodine Test for Starch Introduction and Hypothesis: In this experiment‚ we used iodine to test for starch in certain solutions. Iodine separates starch from polysaccharides‚ monosaccharides‚ and disaccharides. Starch is a curled polymer of glucose and iodine interacts with molecules‚ which changes the color of the molecules to a kind of black color. Iodine does not respond with carbohydrates that are not curled or coiled‚ thus the color stays yellowish brown. A black color result means that starch
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accelerate the rate of a reaction by factors of at least a million as compared to the same reaction without the enzyme. Most biological reaction rates are not perceivable in the absence of the enzyme. The term enzyme was first used by a German pshysiologist Wilhelm Kühne in 1897. There are over 700 different kinds of enzymes that have been identified. Enzymes can be classified into several categories such as hydrolytic‚ oxidizing‚ and reducing. One of the simplest biological reactions by an enzyme is the
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temperature on the rate of the iodine clock reaction using ammonium persulfate Assessment criteria: Design Variables: Table 1.1: List of dependent and independent variables. S.No | Dependent variables | Independent variables | Controlled variables | 1. | Rate of reaction | Temperature | Concentration | 2. | - | - | Pressure | 3. | - | - | Volume | Hypothesis: The iodine clock reaction is an experiment that demonstrates
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BIOCHEMISTRY 304 Enzyme Kinetic Sample Problems #1 September 2004 1 Given the reaction k1 kp E + S ES E + P k-1 where k1 = 1 x 107 M-1 sec-1 k-1 = 1 x 102 sec-1‚ and kp = 3 x 102 sec-1 a) Calculate Ks b) Calculate Km (a) k-1 1 x 102 sec-1 Ks = k1 = 1 x 107 M-1 sec-1 = 1 x 10-5 M (b) k-1 + kp (1 x 102 sec-1) + (3 x 102 sec-1)
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Introduction Reactions don’t always produce the same product‚ even if the reactants are kept constant. Some reactions have the capacity to produce two or more different products‚ depending on the reaction conditions and control such as thermodynamic and kinetic control. Thermodynamic control produces more stable products (University of Windsor‚ 2015). A kinetic control forms products at a faster rate faster rate because of its lower activation energy (UC Davis ChemWiki‚ 2015). By manipulating these
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Enzyme Kinetics Marcos‚ Nelissa S. Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City 1101 Philippines ABSTRACT The rationale of the experiment is basically founded in the concept of reaction rates as affected by enzyme‚ and how the enzyme works is competed by a competitive inhibitor‚ thereby impeding the forward reaction. In this experiment‚ o-diphenol oxidase‚ an enzyme that causes the browning in fruits‚ was extracted from banana and reaction rate of this was established
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