of techniques including moisture analysis‚ pH measurement‚ acid-base titration‚ chloride-ion electrode analysis‚ and flame testing. The sample had a greater concentration of chloride ions‚ no measurable CaCo3 ‚ and lower than standard moisture content. It was contaminated with KCl and likely HCl ionic solids. Introduction Soil is a vital component of any environmental network. It provides the basis for life for any environment. There are many factors that determine what life comes from soil such
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experiment calcium carbonate will be put into a flask and mixed with hydrochloric acid to produce calcium chloride‚ water and carbon dioxide. The formula for this reaction is: CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l) Purpose: The purpose of this experiment is to determine how the surface area of CaCO3(s) affects the rate of reaction by measuring the volume of CO2(g) produced with time. Background: When solid reactants are mixed with liquid reactants only the particles
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This lab will investigate these affects on the rate of a specific reaction. Aim: How does the concentration of HCl affect the rate of the following reaction? CaCO3 (s) + 2HCl (aq) CaCl2 (aq) + CO2 (g) + H2O (l) Variables: Independent variable: Concentration of HCl Dependent variable: Amount of CO2 produced Controlled Variables: Temperature of the room‚ and the HCl No stirring or shaking of the experiment at any times The same type test tube should be used in each trial Try
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more energy goes into this reaction than out to produce the desired results. CaCO3(s) CaO(s) + CO2 (g) It is the enthalpy change of this reaction that this experiment was designed to find. Of course‚ another route must be used to achieve this‚ so HCl is added to CaCO3 and to CaO‚ and then‚ through some calculations and the equation = M * C * can the enthalpy of the decomposition of calcium carbonate be found. CaCO3 + 2HCl ( CaCl2 + CO2 + H2O CaO + 2HCL( CaCl2 + H2O These two reactions will
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The mass of CaCO3 needed was calculated using the ideal gas law and stoichiometry; the amount needed was 0.256 g of CaCO3. Three measurements of 0.256 g were used for three trials. Each trial‚ CaCO3 was placed into a tissue paper‚ and then tied off with a string to prevent the loss of CaCO3. The diameter and the length of the tube connecting the pressure measuring device to the stopper were measured
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Synopsis: The main aim of the experiment is to find out the amount of calcium carbonate in toothpaste through back titration since calcium carbonate does not dissolve in water. A roughly weighed amount of calcium carbonate is mixed with hydrochloric acid and then titrated against sodium hydroxide. When the indicator turns from pink to orange‚ the volume of sodium hydroxide used is taken down. After doing some calculations‚ the average percentage of calcium carbonate in toothpaste is 19.2%. This average
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Chemistry 104: Analysis of Commercial Antacid Tablets Hydrochloric acid (HCl) is one of the substances found in gastric juices secreted by the lining of the stomach. HCl is needed by the enzyme pepsin to catalyze the digestion of proteins in the food we eat. Heartburn is a symptom that results when the stomach produces too much acid (hyperacidity). Antacids are bases used to neutralize the acid that causes heartburn. Despite the many commercial brand‚ almost all antacids act on excess stomach
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indirect titration. Water hardness was identified by the amount of calcium carbonate (CaCO3) in ppm. The control group consisting of the branded commercialized drinking water had a concentration less than 43 ppm of CaCO3 and was considered as soft based on table of water hardness classification. The water samples collected from the Boys’ dormitory‚ Administration Building‚ Gymnasium‚ Girls’ dormitory‚ and Canteen have CaCO3 concentrations greater than 43 ppm and were classified as slightly hard. The water
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Changing the Rate of Reaction PART 1: PARTICLE SIZE Question: How does changing the particle size of marble (CaCO3) affect the rate of reaction when it is added to hydrochloric acid (HCl)? Hypothesis: If I change the particle size of marble to test how to change the rate of a chemical reaction‚ than the chemical reaction with the smallest marble particles will produce CO2 the quickest because the larger the surface area‚ the more place the hydrochloric acid will have to collide with the marble
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Variables Independent variable: The temperature of HCl is going to be changed. The temperature 10℃‚30℃‚50℃‚70℃ and 90℃ of hydrochloric acid will be used to conduct the experiment. The hot plate is going to be used to reach 30℃‚50℃‚70℃ and 90℃‚ that are higher than the room temperature. Ice cubes can be used with water bath to make 10℃ hydrochloric acid. Dependent variable: The time it takes for carbon dioxide gas produces up to 20mL of gas syringe is going to be measured. It will be measured
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