Types of Chemical Reactions PDF

Unit 2: Types of Chemical Reactions  Chemical Reactions ⦿ A reaction occurs when one or more substance changes in chemical composition to form new substance(s). ⦿ We can predict the type of reaction that occurs by looking at the reactants and pr...

Unit 2: Types of Chemical Reactions  Chemical Reactions ⦿ A reaction occurs when one or more substance changes in chemical composition to form new substance(s). ⦿ We can predict the type of reaction that occurs by looking at the reactants and products.  Synthesis Reactions ⦿ Two or more reactants combine to form one product. ⦿ General formula: A + B → AB We can use this pattern to predict the products of a synthesis reaction  Synthesis Reactions ⦿ Synthesis reactions can occur in different ways: Two or more reactants combine to form a binary compound S(g) + O2(g) 🡪 SO2(g) An element and a compound combine to form a new compound 2 SO2(g) + O2(g) 🡪 2 SO3(g) Two compounds combine to form a new compound SO3(g) + H2O(l) 🡪 H2SO4(aq)  Decomposition Reactions ⦿ One compound breaks down into two or more products. ⦿ General formula: AB 🡪 A + B  Decomposition Reactions ⦿ Decomposition reactions can occur in different ways: A binary compound decomposes into its elements 2 H2O(l) 🡪 2 H2(g) + O2(g) A metal nitrate decomposes into oxygen and a metal nitrite 2 KNO3(s) 🡪 2 KNO2(s) + O2(g)  Decomposition Reactions A metal carbonate decomposes into a metal oxide and carbon dioxide CaCO3 (l) 🡪 CaO(s) + CO2(g) A metal hydroxide decomposes into a metal oxide and water Ca(OH)2(s) 🡪 CaO (s) + H2O (g) A metal chlorate decomposes into a metal chloride and oxygen KClO3 (l) 🡪 KCl(s) + O2(g)