Name: Per: Chemical Reactions Students will be able to - List and observe the signs of a chemical reaction. - Write a chemical equation from a description of a reaction. - Identify the type of reaction given an example. What is a chemical reaction? What do you picture when you hear the term “chemical reaction?” Demonstrations Demo #1 – Burning ethyl alcohol Evidence of a Chemical Reaction Chemical Equation Demo #2 – Cabbage Juice Indicator with Acid/Base Evidence of a Chemical Reaction Chemical Equation N/A Demo #3 – Copper in Nitric Acid (Oxidation/Reduction) Evidence of a Chemical Reaction Chemical Equation Demo #4 – Lead Nitrate and Potassium Iodide Solutions (Precipitation) Evidence of a Chemical Reaction Chemical Equation Name: Per: Signs of a Chemical Reaction 1) 2) 3) 4) Reactants Products States: Diatomic elements: Types of Chemical Reactions Set A ______________________ 4Fe(s) + 3O2(g) 2Fe2O3(s) N2(g) + 3H2(g) 2NH3(g) 2SO2(g) + O2(g) 2SO3(g) What do you notice about all of the reactions in Set A? _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ MgO(s)+ H2O(l) Mg(OH)2(aq) _____________________________________________________________________ P2O5(g) + 3H2O(l) 2H3PO4(aq) _____________________________________________________________________ SO3(g) + H2O(l) H2SO4(aq) Set B ______________________ What do you notice about all of the reactions in Set B? MgCO3(s) MgO(s) + CO2(g) _____________________________________________________________________ 8Li2S(s) 16Li(s) + S8(s) _____________________________________________________________________ 2H2O(l) 2H2(g) + O2(g) _____________________________________________________________________ 2KClO3(s) 2KCl(s) + 3O2(g) _____________________________________________________________________ 2Na2O2(s) 2Na2O(s) + O2(g) _____________________________________________________________________ (NH4)2CO3(s) 2NH3(g) + H2O(l) + CO2(g) Name: Set C _________________________ 2FeCl3(aq) + 3Zn(s) 2Fe(s) + 3ZnCl2(aq) Per: What do you notice about all of the reactions in Set C? ________________________________________________________________ Mg(s) + CuSO4(aq) MgSO4(aq) + Cu(s) ________________________________________________________________ 2Al(s) + 6HCl(aq) 2AlCl (aq) + 3H (g) ________________________________________________________________ Cl2(g) + 2NaBr(aq) 2NaCl(aq) + Br2(l) ________________________________________________________________ ZnBr2(aq) + F2(g) ZnF2(aq) + Br2(l) 2Al(NO3)3(aq) + 3Ca(s) 3Ca(NO3)2(aq) + _________________________________________________________________ ____ 2Al(s) Set D _________________________ AgNO3(aq) + NaCl(aq) AgCl(s) + NaNO3(aq) 2HNO3(aq) + Mg(OH)2(aq) Mg(NO3)2(aq) + 2H2O(l) Na2CO3(aq) + CaCl2(aq) CaCO3(s) + 2NaCl(aq) FeS(s) + 2HCl(aq) H2S(g) + FeCl2(aq) HCl(aq) + NaOH(aq) H2O(l) + NaCl(aq) FeBr3(aq) + K3PO4(aq) FePO4(s) + 3KBr(aq) Set E _________________________ CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) What do you notice about all of the reactions in Set D? _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ What do you notice about all of the reactions in Set E? _______________________________________________________ C10H8(g) + 12O2(g) → 10CO2(g) + 4H2O(g) _______________________________________________________ 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g) _______________________________________________________ 2CH3OH(g) + 3O2(g) 2CO2 (g) + 4H2O(g) _______________________________________________________ _______________________________________________________ _______________________________________________________ Name: Per: Define the following reactions and then go back to each reaction set and label them. 1. Synthesis – 2. Decomposition – 3. Single Replacement – 4. Double Replacement – 5. Combustion – Practice What is the difference between synthesis and decomposition reactions? Use the following examples to help you explain: Synthesis: H2 + O2 H2O Decomposition: NaCl Na + Cl2 What is the difference between single and double replacement reactions? Use the following examples to help you explain: Single replacement: Li + Ca3(PO4)2 Li3PO4 + Ca Double replacement: MgCl2 + NaF NaCl + MgF2 Synthesis Reaction Writing Write the chemical equations for the following reactions: Hint: Don’t forget about diatomics! a) Sodium reacts with chlorine to create sodium chloride. b) Potassium oxide reacts with water to create potassium hydroxide (use polyatomic chart). c) Mg + O2 _________________ d) K + P __________________ Name: Per: Decomposition Reaction Writing Write the chemical equations for the following reactions: a) Water decomposes into hydrogen and oxygen. b) Sodium chloride decomposes into sodium and chlorine. c) BaO ___________ + ____________ d) Be3N2 ___________ + ___________ Single Replacement Reaction Writing Write chemical equations for the following reactions. a) Phosphorus reacts with sodium chloride to produce sodium phosphide and chlorine. b) Aluminum (III) sulfate reacts with barium to produce barium sulfate and aluminum. c) Mg + CuNO3 __________________ + ________ d) Na + Ca3P2 ___________________ + _________ Complete the following single replacement reactions: a) NaCl + Ag _________________ + _________ b) Li + Ca3(PO4)2 ________________ + ________ Double Replacement Reactions Complete the following reactions by providing the formulas for the missing compound(s). a) Cu(NO3)2 + ____________________ NaNO3 + CuCl2 b) ZnI2 + ___________________ ZnSO4 + AlI3 c) K2O + MgBr2 __________________ + _________________ Categorize each of the following reactions as single replacement (SR), double replacement (DR), synthesis (S), decomposition (D) or combustion (C). _____a) Ca + O2 CaO _____c) C4H10 + O2 CO2 + H2O _____b) Mg(NO3)2 + Cu CuNO3 + Mg _____d) Al2O3 Al + O2 Name: _____e) SrCl2 + F2 SrF2 + Cl2 _____f) BaF2 + Na2O BaO + NaF Per: Name: Per: