r Lab Report 5 Introduction to the Classes of Chemical Reactions Course: Chem. 1151L‚ Tuesday & Thursday June 23‚ 2011 Mr. Nasir Uddin Pre Lab Questions: 1. CaBr2 (aq) + K3PO4 (aq) → CA(PO4)2(S) + KBr (aq) = Ca3(PO4)2 + 6 KBr Double Replacement 2. Li(s) + O2(g) = Li2O(s) =2 Li2O Decomposition 3. CH4 + O2 = CO2 + H2O = CO2 + 2 H2O Combination 4. AgBr(s) = Ag (s) + Br2(l) = 2 Ag + Br2 Combination 5. Mg(s) + H2SO4 (aq) = MgSO4 + H2
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Beach In A Beaker Introduction: The purpose of this lab is to create a heterogeneous mixture from substances commonly found at the beach. Sand and salt water will be added to the beaker to be separated. The sand will then be separated through the means of filtration. Then the salt will be separated from the water through evaporation. Theory: If the heterogeneous mixture is separated through filtration then the salt water and sand should be separated completely.A heterogeneous mixture is a mixture
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types of impurities: those more soluble in a given solvent than the main component and those less soluble. (If there are any impurities that have the same solubility as the main component‚ then a different solvent needs to be chosen.) When organic substances are synthesized in the laboratory or isolated from plants‚ they will obviously contain impurities. Several techniques for purifying these compounds have been developed. The most basic of these techniques for the purification of organic solids is
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to create an entirely different and new product. Celluloid quickly moved into many markets‚ including the first photographic film used by George Eastman to produce the first motion picture film in 1882. The material is still in use today under its chemical name‚ cellulose nitrate. In 1909‚ Dr. Lee Hendrik Baekeland introduced phenoformaldehyde plastics (or "phenolics"‚ as they are more popularly known)‚ the first plastic to achieve worldwide acceptance. More importantly‚ Baekeland also evolved techniques
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container of water and inspected for pigmentation changes. In the experiment the pigments will rise up the filter paper once exposed to the water (solvent). After the experiment‚ it concludes that the mixture is a homogeneous mixture due to the chemical values equaling out with one another. Date:Tuesday‚ January 14‚ 2014 Purpose:The purpose of this experiment is to discover the various pigments isolated in the Expo Markers and to determine if they are homogenous or heterogenous mixtures
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Separation of a Mixture of Solids PURPOSE: The purpose of this lab is to familiarize ourselves with the techniques associated with separating a mixture of different solids. We will learn how the unique properties of substances can aid in this process and help us distinguish each pure substance from one another. DATA OBSERVATIONS CALCULATIONS CONCLUSION/DISCUSSION QUESTIONS A. How did your proposed Procedures or flow charts at the beginning of this experiment compare to the actual Procedures
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cup until the sugar is dissolved completely and the food dye in mixed in well. 5. Take a pipette and fill it with the substance in Cup 5. 6. Drop 10-20 drops down the side of the inside of a test tube (you may need to refill the pipette to accomplish this). 7. Rinse the pipette out in the sink. Flush the pipette out several times. 8. Take a pipette and fill it with the substance in Cup 4. 9. Drop 10-20 drops slowly down the side of the inside of the same test tube. 10. Rinse the pipette out
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alcohol and 75% chlorofluorocarbon (CFC) propellant. This compound chemicals capable of reducing a variety of unpleasant odors‚ and deliver fragrance is the product of AIR FRESHENER Air Freshener reduces/removes several of unpleasant odors such as cigarette smoke‚ urine and fecal odors‚ cooking smells and odors typically associated w/ fish. In the early 1950’s many companies began to add odor-counter-octant chemicals to their formulas giving way for this air freshener to be known in the
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Apparatus To recrystallize a substance you must have a test tube or beaker in which to dissolve the compound into the solvent. You must also have a heater with which to heat the solvent and get a saturated compound solution. Two Real World Applications for the Technique One real world use for recrystallization is in the creation of aspirin‚ making the substance pure and safe to be ingested. Another use of recrystallization is in metal‚ where
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Introduction: The chemical industry has become one of the largest manufacturing industries in the world since the beginning of the 21st century (Murmann‚ 2003). They convert raw materials such as oil‚ natural gas‚ air‚ water‚ metals‚ and minerals into more than 70‚000 synthetic chemicals (United States Department of Commerce‚ n.d.). Heavy demands on chemicals allowed prosperity of materials goods and had brought convenience for many people. Now they can be found everywhere around world‚ and even
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