Zinc is a lustrous bluish-white metal. It is brittle and crystalline at ordinary temperatures but it becomes ductile and malleable when heated between 110°C and 150°C. It is a reactive metal that can combine with oxygen and other non-metals and will react with dilute acids to release hydrogen. Mostly zinc is used for galvanizing iron with more than 50% of metallic zinc goes into galvanizing steel and in the preparation of certain alloys. Then‚ zinc is added during industrial activities such as mining
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Abstract: The purpose of this lab was to use potentiometry to measure the concentration of a specific chemical species in a solution. This was conducted in 2 stages. The first stage involved making a solution of potassium iodide. The potassium iodide was then diluted to several different concentrations that were ran in potentiometer to find the mV of each solution which would then be used to find the PH of the solution. After analyzing a sample of each concentration an unknown solution was compared
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The Chemistry of Decomposition Decomposition is defined as the biological and chemical changes a body undergoes after death. It is the decay of tissues and structures. There are two types of decomposition: abiotic and biotic. Abiotic decomposition is defined as the degradation of a substance by chemical or physical processes; such as hydrolysis‚ reduction‚ or oxidation. Biotic decomposition is the metabolic breakdown of materials into simpler components by living organisms. This is typically
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The Decomposition of Potassium Chlorate Hypothesis: Potassium chlorate decomposes into potassium chloride and oxygen gas‚ which means that when the glowing splint is inserted into the test tube‚ the flame will have enough fuel to fully reignite the splint. When the manganese dioxide is added‚ this will increase the rate of the production of oxygen in the reaction‚ without affecting the state of the manganese oxide. Materials: Test tube Retort stand Bunsen burner Scoopula Flint sparker 2cm of potassium
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Functional Decomposition Diagram An analyst first must understand an organization’s business functions before he or she can begin developing information systems. The functional decomposition diagram (FDD) is a business planning tool that depicts the hierarchy of business functions‚ processes‚ and subprocesses within an organization that are later described in detail using process models (chapter 6). The exercise of breaking down‚ or decomposing‚ the business functions into processes makes complex
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The lab today was focused on finding the ratio of reactants to products to be either 1 to 1 or 1 to 2. In our case the reactants was Lead (II) Nitrate and Potassium Iodine. These two when mixed together make Lead Iodide and Potassium Nitrate. We also had to try and find if the number of moles of Lead(II) Nitrate was the same as the final number of moles for Lead Iodine after the experiment. Our data for the lab had pinpoint accuracy. Proved by the data table below Trials Volume of Pb(NO3)2 Mol
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AIM: To carry out a lab experiment to decompose a carbonate using heat‚ also to carry out appropriate tests for the formation of products as a result of this decomposition. DISSCUSION: Carbonates are decomposed by heat into the corresponding oxides and carbon dioxide. The temperature of decomposition depends upon the activity of the metal; that is to say‚ the more active the metal‚ the more stable is the carbonate. Thus‚ the carbonates of sodium and potassium are stable at the highest temperature
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Peroxodisulphate and Iodide practical – exemplar Skill A – Chemical Ideas Reaction between Peroxodisulphate and Iodide The reaction between peroxodisulphate and iodide ions is given by the following equation: S2O¬82- (aq) + 2 I- (aq) 2 SO42- (aq) + I2 (aq) The structure of the peroxodisulphate ion‚ with oxidation states‚ is shown below: (Structure) The changes in oxidation state within the reaction are as follows: Element Oxidation state in reactant Oxidation state in product Oxidised or
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Grass Decomposition Lab Problem: How do temperature‚ sunlight‚ amount of moisture‚ and presence of oxygen affect the decomposition of grass? Controlled Variable: Amount of grass and water in each container. Independent Variable: temperature‚ sunlight‚ amount of moisture‚ presence of oxygen. Dependent Variable: decomposition rate of grass. Hypothesis: I believe that there will be the most decomposition in high temperatures‚ low sunlight‚ low amount of moisture‚ and high presense
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The Decomposition of Baking Soda Purpose: - To determine the correct balanced equation for the decomposition of baking soda using % yield. PreLab Notes: Sodium Bicarbonate (Baking Soda) decomposes when heated yielding both gaseous products and solid products. The production of gas makes baking soda a leavening agent in baked goods. The trapped bubbles of gas give muffins and cakes a lighter‚ airier texture. When heated‚ baking soda decomposes in one of the following unbalanced equations.
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