Rachel Rodriguez Anthony Chirumbolo December 8‚ 2011 Chemistry I‚ Pd 11‚ Station K Evidence of Chemical Change Purpose To observe several chemical changes (reactions) and the evidence they exhibit for chemical change. Data See page 3 Analysis The two terms that describe possible energy change in a chemical reaction are Exothermic‚ for example when a gas is formed when Copper II Chloride and Aluminum are mixed‚ and Endothermic‚ for example when copper II Hydroxide is heated
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Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. To observe some properties of chemical reactions 2. To associate chemical properties with household products Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. Three that you should not see in this lab are changes in temperature‚ presence of a flame‚ and evolution of light‚ as when as firefly glows. Three physical changes that indicate a chemical change
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Observations and Chemical Changes By: Andre the Giant Higgson 02/19/14 CHE 107 E1 Intro to Chemistry 1 Objective Certain Chemicals like Bromthymol blue and Phenolphthalein can be added to other chemicals to determine acidity or basicity. Other reactions can be observed as well when different chemicals are added to each other. Procedure This experiment involved placing drops of specified chemicals into a well on a 96well plate. Each well number was recorded along with question number and name of chemicals involved
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Chemical Earth 1. The living and non-living components of the Earth contain mixtures Construct word and balanced formulae equations of chemical reactions as they are encountered 1. Build a word equation Reactants on left‚ Products on right 2. Convert word equation into chemical formula for the reactants and products Using valency rules 3. Balance the equation Adjust coefficients to get equal numbers of each kind of atom on each side 4. Specify the physical state for each species present
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Observing and deciphering Chemical Changes Purpose The purpose of this experiment is to observe reactions of chemicals that can be found in consumer products. Through observation‚ students should be able to interpret the chemical reactions and determine some characteristics‚ such as pH and solubility. Method 1. Pipets containing chemicals will be opened using scissors to snip the end and each pipet will be placed in a well of a 24-well plate. The scissors must be washed between each pipet. 2
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Nicolette F. Nuñez August 11‚ 2010 Grade Level: Grade 8- Damselfly Subject: Biology LESSON PLAN Lesson: Chemical Reactions + Catabolism/Anabolism Number of Meetings: 1 Behavioral Objectives: At the end of the lesson‚ students should be able to: a.) Relate chemical reactions with metabolism b.) Identify the major components of a chemical reaction c.) Describe at least one everyday example of an endergonic and exergonic reaction d.) Relate the breakdown and formations
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Chemical Kinetics‚ A Clock Reaction Abstract The purpose for the experiment Chemical Kinetics‚ a clock reaction is to figure out the reaction rate of a solution regarding its concentration‚ temperature‚ and also determine the effects of when a catalyst is present. The experiment resulted that the concentration‚ as well as its temperature can affect the rate constant inversely the outcome of the rate constant. By conducting the experiment‚ it is also discovered that the rate order of the reaction
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Title: Kinetics: The Rate of a Chemical Reaction Objectives: 1. To study the kinetics of chemical reaction‚ 2 I- + S2 O82- I2 + 2 SO42- . 2. To study the effects of reactant concentration (persulphate‚ S2O82-‚ and iodide‚ I-) and temperature on the rate of chemical reactions. ( i) Study the effect of 0.20M (S2O82-) on the rate of chemical reaction. ( ii) Study the effect of 0.10M (S2O82-) on the rate of chemical reaction. ( iii) Study the effect
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Introduction Chemical Kinetics‚ described as the study of rate of chemical processes‚ varies on many factors to determine the time needed for a reaction to complete. The rate of reaction of a chemical reaction is important‚ as reactions are of little use if the time period needed for the reaction to occur is too lengthy. Many factors influence the rate of a chemical reaction‚ such as temperature‚ concentration and surface area. The order of the reaction is based on the concentration of the reactants
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What Factors Affect Chemical Equilibrium? Introduction: In investigation 14‚ “What Factors Affect Chemical Equilibrium?”‚ the purpose was to find out which reagents caused a change in the chemical equilibrium. A deep red color was formed when Iron Nitrate [Fe(NO3)3 (aq)] was mixed with water and Ammonium Thiocyanate [NH4NCS (aq)]. The product of these two reactants was Iron Thiocyanate(FeNCS). After different trials of mixing the given reagents
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