salt compound being applied to the driveway is made up of in order to get a clear picture of how it may be affecting the grass growth. Salt is sodium chloride that occurs naturally on earth as mineral halite. When mineral halite evaporates‚ it turns into salt lakes. The chemical compound is NaCl with 60.663% elemental chlorine (Cl) and 39.337% sodium (Na). Salt crystals are cubic in form and can be modified by temperature. Salt that is commonly used for deicing is rock salt also known as halite
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observed | Ethanol (c2H5OH) | No | Nothing changes | Nothing changes | Calcium Hydroxide (Ca(OH)2) | Yes | Light bubbles | Light bubbles but more than in anode | Potassium Bromide (KBr2) | Yes | Produced yellow color and bubbles | Bubbles | Sodium Iodide (NaI) | Yes | Produced yellow brown and bubbles | A lot
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Chemical Reactions I. Purpose – The purpose of this lab was to observe different type of chemical reactions to write and balance chemical equations. II. Hypothesis: If you mix two chemicals together‚ then they will change color and/or bubble/fix. III. Procedure - Workstation 1: 1. Light the Bunsen Burner 2. Add 5 – 8 mL of HCL to a test tube that’s in the test tube rack 3. Drop a 2 – cm piece of Mg ribbon into the test tube 4. Record Observations 5. Clean Workstation
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your beaker and add 50 mL of distilled water. b. Set up the beaker stand and burner fuel and heat the beaker of solids and water to near boiling. Stir the mixture to make sure all soluble material dissolves. At this point‚ the benzoic acid and the sodium chloride should have dissolved and been extracted from the insoluble sand. c. Decant (pour) the liquid while it is hot into a small paper or Styrofoam® cup. d. Pour another 10 to 15 mL of distilled water into the beaker containing the sand‚ bring
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PART IX - SPICE AND SALT 106. Prohibition to sell sub-standard spice (1) No person shall import‚ process‚ store‚ expose for sale or sell any spice which does not comply with the standard specified in paragraph (2). (2) (a) Spice shall be the sound leaves‚ flowers‚ buds‚ fruits‚ seeds‚ barks or rhizomes of plants that are suitable for use as condiments for imparting any flavour or aroma to food; (b) Aniseed shall be the dried‚ ripe fruit of the plant
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11/17/2011 The Preparation of Calcium Carbonate Purpose: To create chalk (calcium carbonate) and to find the percentage yield in order to see the amounts of anhydrous sodium carbonate and calcium chloride were used up. Also to see if there’s any alterations like mass differentials. Objectives: 1. To introduce the concept of “limiting factor” in a chemical reaction 2. To practice a. Writing a balanced equation b. Determining the number of moles of each reactant and product
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The hypothesis for both experiment which involved iron( III ) Nitrate and sodium hydroxide for the first experiment and antacid tablet in water was that the mass would increase by a small amount since during the reaction the product will gain additional energy and mass. Apparatus and Materials: Eye protection test tube two hundred and fifty milliliters beaker Balance to measure the masses dilute solutions of sodium hydroxide and iron(III) nitrate
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over-the-counter ingredients. It is also used as a lubricant and topical anesthetic on intratracheal catheters and pharyngeal and nasal airways to obtund the pharynegeal and tracheal reflexesl.2 Sodium channel binds to benzocaine and stabilizes the neuronal membrane which decrease its permeability to sodium ions.1 In this experiment‚ the synthesis of benzocaine is carried out by the acid-catalyzed esterification of 4-aminobenzoic acid with ethanol.2 Theoretical Yield: 1.25g/MW 137 = .009 moles C2H6O
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different concentrations of sodium thiosulphate (Na S2 O3) affects the speed of its reaction with Hydrochloric acid (HCL). Introduction When Sodium Thiosulphate and Hydrochloric acid react they produce a cloudy precipitate. Both of the chemicals are clear solutions and they react together to form a yellow precipitate of sulphur‚ the equation for this reaction is: Na2 S2 O3 + HCL‚ H2 O + NaCL + SO2 + S Sodium Thiosulphate + Hydrochloric acid‚ Water + Sodium chloride + Sulphur dioxide
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again can interfere with the functions of that metal. Aim: the aim of this experiment is to evaluate the effect that sodium chloride has on the rate of corrosion of iron. 1. Experiment 1 2. Hypothesis: An increase in the level of sodium chloride in water will increase the rate of corrosion of an iron nail. 3. The independent variable is the amount of sodium chloride in the water 4. The dependent variable is the rate of corrosion; this will be measured by calculating the percentage
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