acid + metal -------->salt + hydrogen acid + metal oxide--->salt + water acid + metal carbonate---->salt + water + carbon dioxide Element | Symbol | Valency | Hydrogen | H | 1 | Oxygen | O | -2 | Carbon | C | 4 | Calcium | Ca | 2 | Iron | Fe | 2 | Aluminium | Al | 3 | Sodium | Na | 1 | Potassium | K | 1 | Magnesium | Mg | 2 | Zinc | Zn | 2 | Copper | Cu | 2 | Silver | Ag | 1 | Lead | Pb | 2 | Chloride | Cl | -1 | Sulphate | SO4 | -2 | Hydroxide | OH
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and appearance was identified. We determined the solubility of the elements by using distilled water. We used red and blue litmus paper for the Group IIA Metal Oxides. But for the Group IA and Group IIA elements and Group IVA elements‚ we didn’t use litmus paper. Then‚ we wrote a balanced equation to show the reaction between Metal Oxides and water. __________________________________________________________________________ INTRODUCTION Chemical periodicity is defined as the similarities of chemical
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Hydrochloric acid + Magnesium Magnesium Chloride + Hydrogen 2HCl(aq) + 2Mg(s) 2MgCl(aq) + H2(g) Sulphuric acid + Zinc Zinc Sulphate + Hydrogen H2SO4(aq) + Zn(s) ZnSO4(aq) + H2(g) Nitric acid + Aluminium Aluminium Nitrate + Hydrogen 2HNO3(aq) + 2Al(s) 2AlNO3(aq) + H2(g) 2. ACID + BASE –––––––> SALT + WATER Hydrochloric acid + Copper II Oxide Copper II Chloride + Water HCl(aq) + CuO(s) CuCl(aq) + H2O(l) Nitric acid + Aluminium Oxide Aluminium Nitrate
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Enthalpy change of magnesium in combustion Rui Shen Chemistry 4U – Ms .Brazier 2/28/2013 Introduction: Hess ’s law is a terminology in chemistry named after Germain Hess‚ a Swiss-born Russian chemist and physician who published it in 1840. The law states that the total enthalpy change during the complete course of a reaction is the same whether the reaction is made in one step or in several steps. Enthalpy cannot be directly measured‚ but rather the change in enthalpy. Enthalpy is described
Free Thermodynamics Enthalpy Energy
1.Tetrapyrrole Compound (Berg‚ 2009) Figure 2.Pyrrole (de Man‚ 1999) 2 Chlorophyll groups 2.1 Definition and structures Chlorophylls are tetrapyrrole pigments in which the porphyrin ring is in the dihydro form and the central metal atom is magnesium. They are green pigments responsible for the color of leafy vegetables and some fruits. Chlorophylls are diesters of a dicarboxylic acid (chlorophyllin)‚ where one group is esterified with methanol at C-3‚ while the other is esterified with a phytyl
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heat evolved when magnesium reacts with dilute acids. Planning What I am going to do I am going to find out how much heat is given out when magnesium reacts with a variety of dilute acids. In order to make comparisons between the acids‚ I shall use my results to work out how much heat would be given out if 1 mole of magnesium reacted with an excess of each acid. The acids I shall use are hydrochloric acid‚ sulphuric acid‚ nitric acid and ethanoic acid. What I already know Magnesium reacts with most
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_________________ PERFORMANCE GOALS: 1. To learn how to use of a calorimeter 2. To learn how to collect and manipulate data in the computer 3. To calculate the calorimeter constant 4. To use Hess’ Law to find the heat or formation of magnesium oxide CHEMICAL OVERVIEW: • Enthalphy: (ΔH) : when chemical or physical changes occur at a constant pressure. • Calorimeter: is an instrument with insulating walls where the reaction happens. Eq. 1: q rxn = -qsurrounding
Free Enthalpy Thermodynamics
dioxide and the calcium carbonate - Soap and detergents o Used as a base in soap and detergents. It is also used to make sodium phosphate and sodium silicate that act as builders - Softening hard water o The carbonate ions precipitate calcium and magnesium ions‚ this is why it is used in some soaps and detergents - Baking soda production o Sodium hydrogen carbonate or bicarbonate of soda is produced as a part of the process. o The sodium carbonate is dissolved to make a concentrated solution and
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Source 1 Hotbox Food would like to present a line of delicious beverages in completely self heating cans. Thanks to these innovative containers called “Hotshots”‚ it is now possible to drink high quality beverages at any time and at any place. Neither an external heat source‚ nor any other cooking utensils are required. Drinks 2go recipes do not contain additives‚ preservatives‚ artificial colorings or any raw materials obtained from GMO (Genetically Modified Organisms). Source 2 In one version
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In the Chapter on Acids & Bases‚ we learned that Magnesium Hydroxide Mg(OH)2‚ an Basic Oxide is used to make toothpaste. After each meals‚ there will certainly be a significant amount of food substances that are stuck in-between our teeth. Overnight‚ bacteria in these food substances will secrete acids that will corrode our teeth and causes tooth decay. Magnesium Hydroxide(an Basic Oxide) has the basic properties and will neutralize the acids between the teeth to form neutral salt and water‚ which
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