Josh Huver Mr. BillingsH. Chem.5 June, 2006Synthesis reactions occur when two or more simple substances, either elements or compounds, are combined to form only one new and more complex substance. The general form of a synthesis reaction is element or compound + element or compound à compound.Some examples of synthesis reactions in action would are:Metal + oxygen à metal oxide : 2Mg + O2 à 2MgOMetal oxide + water à base : MgO + H2O à Mg(OH)2Nonmetallic Oxide + water à acid : CO2 + H2O à H2CO3Decomposition Reactions occurs when energy in the form of light, heat, electricity or mechanical shock is supplied. A compound may decompose to form simpler compounds and/or elements. The general form of a decomposition reaction isCompound à two or more substances.There are six general types of decomposition reactions. Some oxy-acids, when heated, decompose to form water and the nonmetal oxide. Some metallic carbonates, when heated, decompose to form the metal oxide and carbon dioxide.
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