Draw the structures of white phosphorus and red phosphorus. Which one of these two types of phosphorus is more reactive and why? Explain the following observations: (i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (Z = 29) in the first series of transition elements. Transition elements
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Consturction Material EGC 1131 Assignment 1 Question 1 (a) A significant tendency for large and fine particles in a concrete mix‚ separate among each others. Segregation is caused by * Too wet mix‚ extremely high workability or less cohesive mixture causes the mixture unable to hold heavy aggregate * Dropping from excessive height * Over compaction of fresh concrete. Two methods to minimize segregation in fresh concrete: * Adequate workability is enough. * Don’t over
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wateroxygen+hydrogen. Single deplacement occurs between an element and a compound. During single deplacement reactions one metal replaces another metal in a compound. The general formula for this is: Ax=Y Ay+X. An example of a single deplacement reaction is Copper chloride+Aluminum chloride--+aluminum
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record the tare weight of a clean crucible. According to WiseGEEK‚ tare weight is the weight of an object (such as a jar‚ a cup‚ or‚ in this case‚ a crucible) when it is empty. You will add 2g of the copper sulfate hydrate crystals into the crucible‚ and then you weigh the crucible with the copper sulfate hydrate crystals and record the data. You then heat the crucible with the hydrate in it with a Bunsen burner for slightly more than 10 minutes‚ and then you weigh and record the data into your data
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Fractional crystallization makes use of the differences of solubility to separate the components of a mixture. Goals: Applying fractional crystallization to separate a mixture of salicylic acid and copper sulfate pentahydrate into its components. Calculate the percent of salicylic acid and copper sulfate pentahy- drate in the mixture. Procedure: Block/McKelvy/with contributions from Georgia Perimeter Faculty (2012) - Laboratory Experiments for Chem 1211L & 1212L Cengage Learning (7th ed.) p. 23&24
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formula of the compound) are expressed in this experiment. In this experiment‚ the goal was to find the formula of copper sulfate pentahydrate by heating a sample of the blue compound in order to evaporate the water and receive the white-colored copper sulfate anhydrous. Using the mass of the original sample of copper sulfate pentahydrate subtracted by the new mass of the copper sulfate anhydrous‚ the mass of water lost is obtained and used to find the empirical formula. The expectation for
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Introduction: The purpose of this experiment is to study a set of metals and their reactions reactions using different metals in an ordered activity series‚ the goal is to find the relative reactivity of them.Discovering why metals react with certain cations and solutions is the main point of this lab. This has many real life applications. When creating buildings‚ or bridges it is important to understand and counter-act the rusting of iron. You can do that by using the activity series. For any industry
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Purpose: To find out the percent yield of copper in the reaction between copper sulfate (CuSO4) and Iron (Fe). Materials: Balance 100-mL beaker 250-mL beaker Bunsen burner Copper sulfate crystals Glass stirring rod 100-mL graduated cylinder Iron filings Ring stand and ring Wire gauze Procedure: 1. Record mass of clean 100-mL beaker. 2. Add 8.0 grams of copper sulfate crystals to beaker. 3. Add 50.0 milliliters of distilled water to the crystals. 4. Put wire gauze on ring on ring
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ABSTRACT By calculating the difference in the mass of the hydrate copper (II) sulfate and the anhydride we were able to determine the mass of water in the hydrate. This information was then used to determine the empirical formula of the hydrate‚ defined as a compound formed by the addition of water to another molecule. In the first trial‚ the mass of water in the hydrate was determined to be 0.41 g‚ while in the second trial the mass of water was 0.52 g. Moles of water associated with a single
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…………………………………………………………………………. 15 Classification of Matter Experiment 4 ………………………………………………………………………….17 Chemical Nomenclature: The Language of Chemistry Experiment 5 ………………………………………………………………………….22 Water of Hydration Experiment 6 ………………………………………………………………………….25 Gases Experiment 7 ………………………………………………………………………….27 Oxygen Experiment 8 ………………………………………………………………………….29 Heat and Volume Effects Experiment 9 …………………………………………………………………………
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