baking soda a leavening agent in baked goods. The trapped bubbles of gas give muffins and cakes a lighter‚ airier texture. When heated‚ baking soda decomposes in one of the following unbalanced equations. NaHCO3 (s) H2O (g) + CO2 (g) + Na2O (s) NaHCO3 (s) CO2 (g) + NaOH (s) NaHCO3 (s) H2O (g) + CO2 (g) + Na2CO3 (s) Develop a procedure to determine which reaction occurs. Be sure to include specific quantities‚ times‚ and equipment. Make sure you have a way to assess the precision
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inNaHCO3. Materials: -Test tube clamp - 150 mm test tubes (2) - burner - retort stand - clay triangle - iron ring - crucible Procedure: Part A: 1. Add 0.5 g of NaHCO3 (compared with a sample on display) to a test tube. 2. Obtain a test tube one-quarter filled with limewater 3. Heat the NaHCO3 gently for 2 min over a Bunsen burner‚ while holding the test tube of limewater as indicated in the following
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Experiment 4 Spectroscopic study of Cu(II) Complexes: Crystal Field Theory Objective: To study the effect of ligands on crystal field splitting energy ( E) Theory The color of coordination compounds of the transition elements is one of their characteristic properties. These colors are due to the absorption and subsequent emission of light in the visible part of the spectrum. Light in this region of the spectrum caused promotion of d–electrons from a lower to a higher energy level. The
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Chemistry 2283g Experiment 1 – Alkyl Halides EXPERIMENT 1: Preparation and Reactivity of Alkyl Halides Relevant Sections in the text (Wade‚ 7 ed.) • 6.7 (p. 228) Reactions of alkyl halides • 6.8 – 6.12 (p. 229 – 242) The SN2 reaction: generality‚ factors affecting SN2 reactions‚ substrate reactivity‚ mechanism • 6.13 – 6.14 (p. 243 – 249) The SN1 reaction: mechanism‚ stereochemistry General Concepts The most common of the variety of methods available for preparing alkyl halides is the replacement
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mg for experiment 4B instead of 75 mg for both experiments. Reaction Scheme Data and Results Data and Results Table Expt Benzoid acid Initial (mg) CH2Cl2 (mL) H2O (mL) 10% NaHCO3 solution (mL) Benzoid Acid in CH2Cl2 (mg) Benzoic acid in remaining aqueous (mg) Benzoid acid KpCH2Cl2/H2O or KpCH2Cl2/aq. NaHCO3 * 4A 76 1.0 1.0 NA 56 20 2.8 4B 74 1.0 NA 1.0 7 67 0.10 *Note that for Experiment 4B‚ this calculation does not provide a true partition coefficient because benzoic acid is chemically
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Photosynthesis 1. Would you illuminate your house plants with a green light bulb? Why or why not? It would not be a wise choice to put a plant under a green light bulb. The reason for this is that due to the fact that the leaves are green they reflect green light. This shining green light onto the flowers will cause photosynthesis to stop. Since the light is being reflectd‚ the cells do not get any light. With out light they cannot carry out the everyday occurrence of photosyntesis. If the
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as the carbon dioxide gas is produced. Describing the Chemical Reaction between Baking Soda and Vinegar Baking soda‚ a pure chemical called sodium bicarbonate‚ has the chemical formula: NaHCO3 When dissolved in water baking soda separates into sodium (Na+) and bicarbonate ions (HCO3- ): NaHCO3 ---> Na+(aq) + HCO3-(aq) Vinegar‚ a weak (5%) solution of acetic acid in water‚ partially dissociates into hydrogen ( H+) and acetate ions (CH3COO-): CH3COOH <--> H+(aq) + CH3COO-(aq)
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The purpose of this lab was to see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred. The procedure for this experiment included a few different steps. The first steps were to add the nitrate solutions into the lettered parts of the 96-well plate. Once you were done with that‚ you were supposed to add the sodium solutions to the numbered parts of the 96-well plate‚ so that the solutions were added together
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following: 1. When it is mixed with wet ingredients it reacts to add co2 2. But that is not all when it hits the oven it reacts to the heat as well. Double Replacement: Baking soda (NaHCO3) reacts with acidic substances (HA) in cake batter in a double replacement reaction: Reactant Product NaHCO3 + HA --> Na A + H (HCO3) H(HCO3) is more commonly known as H2CO3. Decompose: * Gas is Produced * Yeast breaks down glucose to release CO2 gas‚ decomposition
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1. Identify the natural sources of sulphur dioxide and oxides of nitrogen. SO2‚ natural: - Geothermal hot springs and volcanic activity are natural sources of SO2. - In the process of decaying of organic matter some bacteria will produces hydrogen sulphide as a waste product which will oxidise‚ forming so2. - Phytoplankton release dimethyl sulphide (DMS) into the atmosphere‚ when this is oxidised it forms sulphuric acid. NOx‚ natural: - Lightning activity generates high temperatures to allow
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