OBJECTIVES: 1. to investigate the heating process for solid dodecanoic acid 2. to investigate the cooling process for liquid dodecanoic acid 3. to determine and compare the melting and freezing points of dodecanoic acid SUPPLIES: Equipment ring stand buret clamp hot plate test tube (18mm * 150 mm) assembly (half full with solid dodecanoic acid with thermometer embedded) beaker (400 mL) thermometer for water bath lab apron safety goggles Chemical Reagents dodecanoic acid‚ C11H23COOH
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So‚ we Question: How does the water temperature affects the solubility of salt. Hypothesis: If the water temperature increase‚ then the solubility of salt increase because in wps.prenball.com stated that most solubility of solid decrease as the temperature decrease. So‚ if we make the temperature colder than‚ the solubility of salt will decrease. Variables: Independent variable: Temperature of the water. Dependent variable: Milliliter of salt. Constants: Bath‚ small beakers
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An alloy is a solid solution or homogeneous mixture of two or more elements where a material with better or different properties is produced. The range of alloys produced depends on the solubility of the constituents and the proportion of them. The number of possible alloy combinations is almost endless since any metal can be alloyed in pairs or in multiples. Alloys can be classified into two main categories:Interstitial alloy. It is when smaller elements‚ such as boron‚ carbon‚ nitrogen‚ or silicon
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exclude impurities from the crystalline solid. HC HC HC CH C CH MgBr + CO2 + HCl HC HC HC CH C CH CO2H ClMgBr Benzoic acid‚ the chemical that we will be purifying‚ can be made by reacting phenylmagnesium bromide with carbon dioxide. When the product of that reaction is treated with hydrochloric acid‚ benzoic acid is formed. From the balanced chemical equation‚ it is clear that the benzoic acid will not be pure since the byproduct MgClBr‚ an ionic solid‚ forms at the same time the desired product
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2. To understand the relation between precipitation state % precipitating conditions 3. To learn the way to examine whether reactants are fully precipitated 4. To learn the principals of powder material synthesizing through room temperature solid phase method & liquid phase method directional growing crystal form of precipitation Experiment Principals 1.the process of precipitation forming constitutive crystal ion accumulating growing forming nuclei sediment particals amorphous precipitation
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completion or not. In order for a reaction to go to completion it must have one of the following three things. First‚ a gas is produced. This gas is usually H2‚ O2‚ or CO2. Secondly‚ a covalent compound (such as water) is formed. Finally‚ a precipitate (solid) is formed. When none of those things happen it is considered to be "no reaction." When one of those things does happen the reaction is considered to be "completed." It is considered to be completed because all of the reagents in the sample have completely
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Filtration Filtration is a mechanical or physical process to separate solid particulates from fluids Filtration is a technique used to separate a solid from a liquid. The solid is separated from the liquid phase by passing the mixture over a filtering media. Filtering media is characterized by being chemically inert to the mixture‚ and having small pathways for the liquid to pass through‚ but these pathways should be smaller than the solid particle size. Filtering media can be prepared using paper‚ fritted-glass
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Part I: Lab Insert completed data tables for each part of the lab. Be sure that the data tables are organized and include units when necessary. Conductivity (4 points Solid Liquid Aqueous Solution Substance A Conductive No Yes Yes Substance B Conductive Yes No No Substance C Conductive No Yes Yes Substance D Conductive Yes No No Part II: Conclusion Answer the following questions in your own words‚ using complete sentences. Based on your observations in the lab
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anhydrous methanol; thiourea; carbon tetra-chloride Introduction Crystalline inclusion complexes represent an intriguing class of supramolecular assembly that continues to receive considerable attention. The rational design of composite solid state materials has many potential applications in areas such as chemical preparation‚ crystals engineering and non linear optics. One tactic commonly employed in the synthesis of potential inclusion hosts is the incorporation of functional groups
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How to Grow Alum Crystals Background Information A crystal or crystalline solid is a solid material‚ whose constituent atoms‚ molecules‚ or ions are arranged in an orderly repeating pattern extending in all three spatial dimensions. The scientific study of crystals and crystal formation is crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification. Potassium alum (Aluminum Potassium Sulfate) is the white crystalline natural
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