→ 2 NaCl(s) Single Displacement • single substitution • anion always replaces anion • cation always replaces cation • Mg + 2 HCl → MgCl2 + H2 • Complete the following Single Displacement (formula is correct) Al + CuSO4 Double Displacement • 2 substitutions • ion-exchange • MgSO4 + BaCl2 →BaSO4 + MgCl2 • Types of Chemical
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Hydrogen (c) HCl (d) Nitrogen 2. Dissolving suger is an example of(a) Physical change (b) Chemical change (c) Redox Reaction (d) None of these. 3. Heat is evolved diving (a) Endothermic Reaction (b) Displacement Reaction (c) Combustion Reaction (d) Combination Reaction 4. Which of the following is not a balanced equation? (a) Fe + Cl2 → FeCl3 (b) Mg + CuSO4 → MgSO4 + C4 (c) NaOH + HCl → NaCl + H 2O (d) Zn + S → ZnS 5. The reaction between lead nitrate and potassium iodide present in aqueous solutions
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have the necessary information to determine the moles of copper and chlorine in your sample‚ and you will be able to establish the proper chemical formula. OBJECTIVES • • • In this experiment‚ you will Ev al Determine the water of hydration in a copper chloride hydrate sample. Conduct a reaction between a solution of copper chloride and solid aluminum. Use the results of the reaction to determine the mass and moles of Cu and Cl in the reaction. • Calculate the empirical formula of the
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In this lab we studied stoichiomentry. We also reviewed the mole-mole relationship between copper and iron in a chemical reaction. The stoichiomentry of mass is that during the heating the experiment does loose mass .This mean that mole and mass did change. An Example of real world is Masses and volumes of products are extremely important in key reactions such as the deployment of air bags in vehicles‚ carbon dioxide production to help bread rise‚ and the Production of ammonia gas for industries
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than proprietary mixes Low Heat Concrete/concrete Low Heat concretes are designed to generate a much lower heat of hydration than standard concrete. This is important in mass concrete applications such as dam walls‚ thrust blocks‚ mass concrete footings or other large elements. The low heat characteristics mean that cracking is less likely due to the smaller heat variations that occur as the concrete sets. Features & Benefits | Lower heat of hydration than standard concrete |
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product. ( c ) (i) I would use High-Early-Strength Cement for my project due to it can develop strength in 7 days (equivalent strength at 28 days). Since it has high heat evolution‚ High-Early-Strength Cement should not be used in large masses. Solution: * After firstly use High-Early-Strength Cement‚ use Low Heat Portland Cement to overcome the problems due to it is used for mass-concrete applications. * Can add admixtures to overcome or solve the problems. (ii) Air-entraining
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proteins were then air-dried. A qualitative test was done to indicate that the sample extracted was the protein whey. Again‚ a small test tube was used and 2 mL of protein test solution was put in the tube. Five drops of 10% NaOH and 2 drops of 0.5% CuSO4 were added to this tube. If a purple color showed‚ it would indicate there was protein in the test tube. In the third separation of this experiment‚ the hood in the lab was used. The curds were placed in a 100 mL beaker and extracted using 30 mL of
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Elena Chen CH 221-227 November 3rd‚ 2009 Lab Report #3: Copper Cycle Abstract: The purpose of the experiment is to cycle solid copper through a series of five reactions. At different stages of the cycle‚ copper was present in different forms. First reaction involves reaction between the copper and nitric acid‚ and copper changed from elemental state to an aqueous. The second reaction converted the aqueous Cu2+ into the solid copper (2) hydroxide. In the third reaction Cu(OH)2 decomposed into
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INTRODUCTION Heat is a form of energy that can be passed from an object with high temperature to an object with low temperature. The heat required to change the temperature of a substance by 1 K is called heat capacity. A calorimeter is a device commonly used to measure the amount of heat that may be produced or assimilated by the system. This device encloses a reaction inside an insulated wall to prevent the exchange of heat between the calorimeter‚ and its surroundings. The heat capacity of
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ONE-SCHOOL.NET Short Notes: Form 5 Chemistry Rate or Reaction Calculation Rate of Reaction (Average Rate) Rates of reaction = Quantity change of reactants/products Total time for the reaction If the quantity change is immeasurable Rates of reaction = 1 Total time for the reaction Find the Rate From a Graph Average Rate Rates At an Instant The rate of reaction is equal to the slope of the graph The rate of reaction at an instant‚ t‚ is equal to the of quantity against
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