Introduction: Chemical reactions is a process that involves rearrangement of the molecular or ionic structure of a substance. There are different types of reaction such synthesis‚ decomposition‚ single replacement‚ double replacement‚ and combustion. Synthesis is where two or more reactants combine to create a product. For Decomposition‚ it is the opposite where a product breaks down into reactants. In Single Replacement‚ reactants switches an element with another element to make a new product. Then‚ in Double
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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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2. Indicate the metals‚ non-metals and metalloids. -38100431803. Show the trends for reactivity and atomic radius. 4. Which of the following elements has the largest atomic radius? Why? a) fluorine b) oxygen c) nitrogen d) calcium Calcium has the largest atomic radius as it has 3 rings of electrons‚ while the rest of the listed elements have 1. 5. Which of the following elements has the largest atomic radius? Why? a) Be b) C c) N d) O All 4 elements have the same atomic
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Polyvinylchloride (PVC) film and sheets are used in a variety of application especially for packaging because their permeability‚ transparency‚ tear and impact properties are important. The effect of unmodified and titanate treated nano-CaCO3 on the microstructure as well as on the mechanical‚ barrier‚ optical properties of PVC films‚ prepared by solution casting method were studied. The tensile strength and barrier properties of nano-CaCO3/PVC increase with increasing loading of CaCO3 nanoparticles
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production of fertilisers‚ nitric acid. Used in home as cleaning agent.-Metallic oxides – e.g. Iron(III) oxide‚ copper oxide and titanium oxide. Metals are extracted from these insoluble bases-Carbonates- Sodium hydrogen carbonate (NaHCO3)-bicarb soda for cakes to rise‚ safely neturalise acids.Sodium carbonate (Na2CO3)- synthesised industrially for use in making
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Water hardness is a measure of the amount of calcium and magnesium carbonate dissolved as Ca 2+ and Mg 2+ in water. There are no health hazards associated with water hardness‚ however‚ it causes scaling‚ as well as forming of soap suds. Compleximetric titration is one of the best ways of measuring total water hardness using a standard ethylenediaminetetraacetic acid (EDTA) solution. EDTA solution is used as it has the ability to easily bind with calcium and magnesium ions. EDTA and Ca2+ react at the
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in presence of electric current/ 4. Define electrolysis. 5. What is decomposition reaction? Give an example 6. Calcium oxide react with water to form calcium oxide. What type of reaction is it? 7. What happen when ferrous sulphate is heated? 8. What happen when copper metal is dipped in silver nitrate solution/Give the balance chemical equation? 9. Write chemical formula for following. a. calcium fluoride.b.iron(II)bromide 10. Write chemical names of a. Ag2O3
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react with metals‚ carbonate compounds & bases/alkalis* * able to turn blue litmus paper red Reactions of Acids 1. Acid + Metal Salt + Hydrogen 2. Acid + Carbonate Salt + Carbon Dioxide + Water 3. Acid + Base/Alkali Salt + Water (Neutralisation) Note: Salts formed always takes the cation (positive ion which is usually a metal) + name of acid. e.g. : Sulphuric acid + SodiumSodium sulphate + Hydrogen Hydrochloric acid + calcium carbonate calcium chloride + CO2
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antacid for hyperchlorhydria • for intestinal toxemia CALCIUM-CONTAINING ANTACIDS • dependent upon their basic properties • raise stomach pH to 7 • constipating • found in combinations with magnesium antacids 1. CALCIUM CARBONATE • precipitated chalk • fast action • found in combinations with Mg antacids • in Lozenges and Oral suspension 2. TRIBASIC CALCIUM PHOSPHATE • Precipitated Calcium Phosphate‚ Tertiary Calcium
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