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Balancing ActName_______________Atoms are not __created___ or ________destroyed___________ during a chemical reaction. Scientists know that there must be the ___same__ number of atoms on each ___side______ of the ___reaction___. To balance the chemical equation, you must add ____coefficients_____ in front of the chemical formulas in the equation. You cannot ___add__ or ___remove____ subscripts.Determine number of atoms for each elementPick an element that is not equal on both sides of the equation.Add coefficients in front of the element and adjust your counts.Continue adding coefficients until you get the same number of elements on each side.22Example:Mg+O2MgOMg =2Mg = 2O =2O = 222Try these:Ca+O2CaOCa =2Ca = 2O =2O = 223N2+H2NH3N = 2N = 2H = 6H = 642Cu2O+CCu+CO2Cu =4Cu = 4O =2O = 2C =1C = 122H2O2H2O+O2H =4H = 4O =4O = 4Balancing Act PracticeBalance each equation. Be sure to show work. Remember you cannot add subscripts of place coefficients in the middle of a chemical formula. 2 Na+MgF22 NaF+MgNa = 2Na = 2Mg = 1Mg = 1F = 2F = 2Mg+2 HClMgCl2+H2Mg = 1Mg = 1H = 2H = 2Cl = 2Cl = 2Cl2+2 KI2 KCl+I2Cl = 2Cl = 2K = 2K = 2I = 2I= 22 NaCl 2 Na+Cl2Na = 2Na = 2Cl = 2Cl = 24 Na+O22 Na2ONa = 4Na = 4O = 2O = 22 Na+2 HClH2+2 NaClNa = 2Na = 2Cl = 2Cl = 2H = 2H = 22 K+Cl22 KClK = 2K = 2Cl = 2Cl = 2Challenge: This one is tough2 C2H6+7 O24 CO2+6 H2OC = 4C = 4H = 12H = 12O = 14O = 14 ................
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