4 • Chemical Equations and Stoichiometry, Lecture notes of Stoichiometry

Download 4 • Chemical Equations and Stoichiometry and more Lecture notes Stoichiometry in PDF only on Docsity! South Pasadena  AP Chemistry Answers Name __________________________________ Period ___ Date ___/___/___ 4  Chemical Equations and Stoichiometry Station 1 – COMBUSTION EQUATIONS Write balanced equations for the complete combustion of the following fuels: Fuel Combustion Equation C3H8 C3H8 + 5 O2  3 CO2 + 4 H2O C6H14 C6H14 + 19 /2 O2  6 CO2 + 7 H2O CH3OCH3 CH3OCH3 + 3 O2  2 CO2 + 3 H2O South Pasadena  AP Chemistry 4  Chemical Equations and Stoichiometry Station 2 – BALANCING EQUATIONS Balance the following chemical equations: 2 KClO3(s)  2 KCl(s) + 3 O2(g) 2 Fe(s) + 3 Cl2(g)  2 FeCl3(s) 3 Pb(NO3)2(aq) + 2 AlCl3(aq)  3 PbCl2(aq) + 2 Al(NO3)3(aq) South Pasadena  AP Chemistry 4  Chemical Equations and Stoichiometry Station 3 – PHASES From the statement, decide whether each substance should be labeled with (s), (l), (g), or (aq): Pure rubbing alcohol is C3H7OH(l). Copper metal is Cu(s). A solution of cupric chloride is CuCl2(aq). Melted iron is Fe(l). Salt water is NaCl(aq). Helium is He(g). Dry ice is CO2(s). Steam is H2O(g). South Pasadena  AP Chemistry 4  Chemical Equations and Stoichiometry Station 4 – EMPIRICAL FORMULAS Determine the molecular formula given the following information: Empirical Formula Molecular Formula Molar Mass 14 g/mol CH2 84/14 = 6 C6H12 84.18 g·mol-1 46 g/mol NO2 92/46 = 2 N2O4 92.02 g·mol-1 87 g/mol NaSO2 174/87 = 2 Na2S2O4 174.14 g·mol-1 137 g/mol PCl3 PCl3 137.32 g·mol-1