Chapter 8 Review LT: I can write, identify and balance chemical equations Warm Up: Page 295 #1-7 (mult. choice) Do these on the paper provided! For yesterday – write the same LT and revisit your answer to #10 on page 295
How can you tell a reaction has occurred? Evolution of heat and light Production of a gas Formation of a precipitate Color change
Chemical equation requirements Must represent known facts Must contain correct formulas Law of conservation of mass must be satisfied
Equation symbols Solid Liquid Gas Aqueous Precipitate forms Yields Gas product Reversible reaction Δ over arrow indicates …. Value or formula over arrow indicates….
Identify reaction types Synthesis A + B AB Decomposition AB A + B Single Displacement AB + C AC + B Double Displacement AB + CD AD + CB Combustion C x H y + O 2 CO 2 + H 2 O
Tell the type of reaction Pb(NO 3 ) 2 + HCl → PbCl 2 + HNO 3 BaO 2 → BaO + O 2 Al+ H 2 SO 4 → Al 2 (SO 4 ) 3 + H 2 CH 4 + Cl 2 → CHCl 3 + HCl MgCl 2 + NaOH → Mg(OH) 2 + NaCl AgNO 3 + CuCl 2 → AgCl + Cu(NO 3 ) 2 ZnS + O 2 → ZnO + SO 2 Na + H 2 O → H 2 + NaOH BaCl 2 + (NH 4 ) 2 CO 3 → BaCO 3 + NH 4 Cl C 6 H 6 + O 2 → CO 2 + H 2 O
Use the Activity Series to determine if these reactions will occur 1. K + Ag 2 S 2. Br 2 + NaCl 3. Pb (IV) + NiCl 2 4. Al + SnO 5. F 2 + KI
Translate Ammonia + oxygen → nitrogen monoxide + water Phosphorus + iron(III) oxide → tetra-phosphorus decoxide + iron Copper (I) sulfide + oxygen → copper(I) oxide + sulfur dioxide sodium bicarbonate + hydrogen sulfate → sodium sulfate + water + carbon dioxide
Balance (NH 4 ) 2 Cr 2 O 7 → N 2 + Cr 2 O 3 + H 2 O Zn 3 Sb 2 + H 2 O -→ Zn(OH) 2 + SbH 3 HClO 4 + P 4 O 10 → H 3 PO 4 + Cl 2 O 7
Predict Products ____Pb(NO 3 ) 2 (aq) + ___ Na 2 (SO 4 ) (aq) -----> ____ H(NO 3 ) (aq) + _____ Mg(OH) 2 (aq) ----> ____ H(ClO 4 ) (aq) + ____ Ca(OH) 2 (aq) ---> _____ Ca (s) + _____ H 2 S (aq) ----> _____ Mg (s) + _______ H 2 O (g) > ___ Mg(CO 3 ) (aq) + ____ HBr (aq) ---> ___ Al (s) + ____ H 2 Se(g) ---> ____ Cu (s) + _____ H 2 Se (g) --->