Step 1: First‚ a container is filled with a solution of a salt of the metal that is to form the coating. For example‚ if copper is to form the coating‚ the solution will consist of copper sulfate (a salt of copper) mixed with water. This solution is called the electrolytic bath. The object to be plated is immersed in the bath. A metal bar‚ composed either of the metal that is to form the coating or of a metal that is not affected by the electrolytic
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contents. For part 2‚ the mass of the anhydrous CaSO4 and water were also converted into moles and utilized to compute the molar ratio of the unknown sample. The ratio for these samples were calculated at a low 2:1 and a high of 12:1‚ water to calcium sulfate; the empirical formulas were CaSO4·2H2O and CaSO4·12H2O respectively. The determined percent mass of hydration was 19.85% and
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1. weighing boat 2. filter paper (Double Rings qualitative 9.0 cm CAT# 1101090) 3. nitrile gloves 4. paper towels Chemicals: Chemical Formula Structure Manufacturer Lot # Methylene Chloride CH2Cl2 ScholAR Chemistry 200935103 Sodium Sulfate Na2SO4 Fisher Science Education AD-914613 Distilled Water H2O WCCC N/A Black Tea Bags N/A N/A Tetley N/A Caffeine C8H10N4O2 (Caffeine) Extracted N/A Procedure: Part A: 1. Plug in hot plate and set to 220.0 oC 2. While waiting for
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Department of Chemistry University of Kentucky EXPERIMENT 5 Molecular Absorption Spectroscopy: Determination of Iron With 1‚10-Phenanthroline UNKNOWN Submit a clean‚ labeled 100-mL volumetric flask to the instructor so that your unknown iron solution can be issued. Your name‚ section number‚ and locker number should be written legibly on this flask. The flask does not need to be dry on the inside‚ but needs to have been rinsed with distilled water after it has been washed. The flask
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Key Questions 8.1 and 8.2: Writing and Balancing Chemical Equations Include phases of matter for ALL reactants and products. Circle the chemical formula of the precipitate‚ if any‚ in each reaction. Balance all chemical equations. 1. Write a chemical equation for the reaction that occurs when solid sodium oxide is added to water at room temperature to yield sodium hydroxide . (Check the Solubility Rules to determine the phase of matter of sodium hydroxide.)
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Katie Sanders Science Block 3 February 29‚ 2012 Title: Analysis of a Hydrated Crystalline Compound Purpose: The purpose of our experiment was to determine the amount of water in copper sulfate pentahydrate expressed as a percent. Hypothesis: I think that bluestone crystals are 20% water‚ because it’s called pentahydrate (penta means five) and 1/5 of 100 (since it’s expressed as a percent) is 20‚ so I think bluestone crystals are 20%
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is the reducing agent so it is oxidized and Nickel is the oxidizing agent so it is reduced. Table: Substances Observations Magnesium and Sodium Sulfate Bubbles Zinc and Magnesium Sulfate No reaction Lead and Zinc Nitrate No reaction Lead and Iron (III) Chloride Lead oxidizes Iron and Copper (II) Sulfate Iron turns pink College Chemistry 1 Unit 2 Lab 2 Chemical and Physical Properties Chemical and Physical Properties Introduction: I will figure
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Test tubes containing water · Test tubes containing 6M hydrochloric acid as needed to clean wire · Test tubes containing: Copper sulfate Potassium sulfate Copper nitrate Potassium nitrate Strontium nitrate Calcium nitrate Copper chloride Strontium chloride Calcium chloride Cobalt chloride Sodium chloride Sodium nitrate Sodium sulfate Barium clroride Calcium nitrate · Tirrel burner · Matches · Goggles · Apron Procedure: Work in teams of two At each
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It’s determined through heating this chemical and gets the normal copper (II) sulfate‚ and then calculated through Stoichiometry. Evaluating Procedure: The lab has some major problems with the lab which include: 1. Water vapours are invisible‚ therefore not able to gain the time that we should stop the fire. 2. However
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reactions and release the energy they need. Common naturally-occurring chemicals used include nitrates‚ sulfates and carbon dioxide. Anaerobic respiration in bacteria generally creates many byproducts. Many of these byproducts can be toxic or dangerous to human beings and include ethanol and hydrogen. Here is a deeper explanation. Anaerobic bacteria use inorganic molecules like nitrate‚ sulfate and carbonate as final electron acceptors in the place of oxygen. These molecules sit at the end of the
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