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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men and women by setting and enforcing standards and by providing training‚ outreach‚ education and assistance.The Occupational Safety and Health Act allows OSHA to issue workplace health and safety regulations. These regulations include limits on chemical exposure‚ employee access to information‚ requirements for the use of personal protective equipment‚ and requirements for safety procedures. OSHA is responsible for enforcing its standards on regulated entities. The agency sends Compliance Safety
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the attack. However‚ this time‚ instead of being struck by a bomb‚ they were struck by a chemical warfare agent (CWA) known as sulfur mustard‚ which destroyed their home‚ murdered their newborn child‚ and resulted in weeks of intense medical care. The use of chemical weapons during World War One revolutionized chemical warfare. Since WW1‚ chemical weapons have grown in popularity. The experience with chemical weapons (CW) in WW1‚ the Northern Yemeni War‚ and Syria demonstrates why the production and
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Executive Summary of Victoria Chemicals Problem Definition: The organization‚ Victoria Chemicals‚ must determine whether or not to improve engineering efficiency through facility improvements at its production plant Merseyside Works. Relevant Facts: The Merseyside Project was evaluated with respect to the following criteria: (1) Impact on earnings per share (2) Payback (3) Discounted cash flow (“DCF”) and (4) Internal Rate of Return (“IRR”). The initial assessment of this project was based
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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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1. Briefly explain the following: a. Chemical equilibrium- Chemical equilibrium is the state of a reaction when the concentrations of the reactants and products are no longer changing and remain constant. The forward reaction proceeds at the same rate as the reverse reactions making them equal. This type of equilibrium is also named dynamic equilibrium or a dynamic process. When a reaction has reached its chemical equilibrium‚ the constant K value will remain constant unless the temperature changes
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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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Patrick Kelly 10/16/12 Physical and Chemical Changes Lab Question: How do you distinguish a physical and chemical change? Hypothesis: If we use these materials and use magnets‚ water‚ burners‚ and filters on the mixtures and elements given we should determine what kind of effect these materials given will have on these mixtures and elements‚ physical or chemical. Procedures: -Part A: Record all observations of Part A in Data Table 1 1. Label each substance on seven pieces of paper
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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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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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