JUST DO IT 3.20.13 Daily Riddle In Question   In Question What are the following compounds? CO2 H2O NaCl

Today in your notebooks PT groups/famillies, PT brainpop PT notes Atomic trends Atomic trends notes Compounds and molecules, BP Bonding notes Atomic arrangements Arrangements notes Valence electrons ws Valence electrons notes Phys/chem change ws Physical and chemical change notes Balancing Chem. reactions Chem. Reactions notes

HW Answers Arrows Energy is lost Food web- network of food chains Trophic level- position it holds in a food chain Autotroph- makes its own food Primary, herbivores Carnivores, omnivores, Carnivores, omnivores 12. vultures, worms, crabs

Chemical Reactions(Right) What is a ch. rxn? What are the parts of a rxn? What do the numbers mean? 4) Why do eqn.s have to be balanced? CH. RXN: The process that turns one set of reactants into something else REACTANTS: What’s mixed together, on the left of the yield sign PRODUCTS: what forms, on the right of the yield sign. Products often have different properties than the reactants 3) SUBSCRIPT: how many atoms of that element COEFFICIENT: how many molecules of that compound 4) Matter can not be created or destroyed, only transformed. Rxns need to be equal because everything on the reactant side turns into something else- nothing disappears!

Common Ions and compounds How do I make??? Type of bond reactants products structure 1. Methane CH4 2. Water H2O

DEMO HC2H3O2(aq) +NaHCO3(s) --> NaC2H3O2(aq) + CO2(g) + H2O(l) 

Balancing Chemical Equations Balance the equations below: 1) ____ N2 + ____ H2  ____ NH3 2) ____ KClO3  ____ KCl + ____ O2 All atoms of an element on the reactant side need to balance with the atoms of that element on the product side 1N + 3H2 -------- 2NH3 2kclo3 --------- 2kcl + 3o2

Work with a partner 3) ____ NaCl + ____ F2  ____ NaF + ____ Cl2 4) ____ H2 + ____ O2  ____ H2O 5) ____ Pb(OH)2 + ____ HCl  ____ H2O + ____ PbCl2 6) ____ AlBr3 + ____ K2SO4  ____ KBr + ____ Al2(SO4)3 7) ____ CH4 + ____ O2  ____ CO2 + ____ H2O 8) ____ C3H8 + ____ O2  ____ CO2 + ____ H2O