70 14 73 15 40 16 79 17 80 18 84 12 45 48 51 52 55 56 59 59 64 65 75 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton 24 96 25 31 115 32 119 33 122 34 128 35 127
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Different elements give off different colors when heated because they all have different chemical properties‚ therefore‚ they will react differently under high temperatures. For example‚ [1] strontium‚ lithium carbonate‚ and strontium carbonate are often used in fireworks to create a red color. Calcium may be used to create orange‚ sodium for yellow‚ aluminum for white‚ barium chloride for green‚ copper for blue‚ strontium and copper for purple‚ and titanium for silver. Even though all elements give off
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observations. 6. Lift the flask out of the water‚ turn it upright‚ and add about 25 ml of limewater. Stopper the flask and swirl the solution for approximately one minute. Record your observations. If the solution becomes cloudy or chalky‚ calcium carbonate was formed‚ indicating the presence of carbon dioxide in the flask. Qualitative Data Procedure step Observations Step
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(a mixture of aluminosilicates) and heating the mixture to about 1500oC. The chemical reaction releases carbondioxide and partially melts the components to form solid lumps called clinker. The clinker is ground to powder‚ and a small quantity of calcium sulfate is mixed in. This mixture is known as Portland Cement. Chemically‚ its main components are 26% dicalcium silicates ( Ca2SiO4); 51% tricalcium silicates (Ca3SiO5); and 11% tricalcium aluminate (Ca3Al2O6). When water is added‚ a number of complex
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CHAPTER I INTRODUCTION: An aqua silencer is used to control the noise and emission in ic engines. The reason why we go for aqua silencer is‚ in today life the air pollution causes physical ill effects to the human beings and also the environment. The main contribution of the air pollution is automobiles releasing the gases like carbon dioxide‚ unburned hydrocarbons etc. In order to avoid this type of gases by introducing this aqua silencer. It is fitted to the exhaust pipe of the engine
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Title: Preparation and isolation of an Ester Aim: To make an ester and purify it Background Theory: Esters are derived from carboxylic acids and alcohols with the presence of a catalyst. A carboxylic acid contains the -COOH group‚ and in an ester the hydrogen in this group is replaced by a hydrocarbon group of some kind. Sulfuric acid (H2SO4)is used as a catalyst for this reaction in order to accelerate the rate at which the product is formed. The general formula of an ester is RCOOR’ in
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Strainer | 1 | Acetone (100%) | 40mL | Calcium carbonate | As much as needed | Pestle and mortar | 1 | Electronic balance | 1 | Scissors | 1 | Ruler | 1 | Measuring cylinder (15mL) | 1 | Beaker (50mL) | 1 | Table 2 shows the apparatus and materials used in this experiment METHOD Preparation of spinach pigment extract: 1. 10g of fresh spinach leaves ( without the veins ) is taken and is placed into a mortar. 2. A pinch of calcium carbonate is added into the mortar. The pestle
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. AIM :. To Determine which Antacid could Neutralize the most Stomach Acid. (Chemistry Project) Project Prepared By: Name Class- Roll no. INDEX page no. Objective 3 Introduction 3 Acids 4 Stomach Acid
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Which Antacid Works the Best? Heartburn is a condition characterized by a burning feeling in the chest and a sour or bitter taste in the mouth. Heartburn usually develops when the acidic contents of the stomach flow back‚ or regurgitate‚ into the esophagus‚ the muscular tube that carries food from the throat to the stomach. Approximately one in ten adults experience heartburn once a week. Heartburn is more common in pregnant women because of the pressure the expanding uterus exerts on the stomach
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ingredients such as aluminum hydroxide‚ calcium carbonate‚ magnesium hydroxide‚ and sodium bicarbonate‚ alone or in various combinations. Antacid products may also contain other ingredients such as simethicone‚ which relieves gas. Antacids differ in how quickly they work and how long they provide relief. Those that dissolve rapidly in the stomach‚ such as magnesium hydroxide and sodium bicarbonate‚ bring the fastest relief. Antacids that contain calcium carbonate or aluminum dissolve more slowly and
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