1. Tuesday January 25, 2011 (Types of Chemical Reactions; Predicting the Products of Chemical Reactions)

2. Write the word equation, then write and balance the formula equation. Solid iron (III) oxide reacts with carbon monoxide gas to produce solid iron metal and carbon dioxide gas. 2 3 3 iron (III) oxide + carbon monoxide æ iron + carbon dioxide Fe 2 O 3(s) + CO (g) → Fe (s) + CO 2(g)

3. We will have a test this Friday.

4. Assignment Currently OpenDate IssuedDate Due WS: Chemical Reactions and Equations Part 1 1/191/26 WS: Word Equations and Formula Equations 1/201/27 Quiz: Word Equations and Formula Equations 1/21 WS: Chemical Reactions and Equations Part 2 1/241/28

5. Types of Chemical Reactions Synthesis Reactions Decomposition Reactions Single-Replacement Reactions Double-Replacement Reactions Combustion Reactions

6. Synthesis Reactions In synthesis reactions (also called addition reactions), two or more substances combine to form a new compound. A + X → AX 2Mg + O 2 → 2MgO 2H 2 + O 2 → 2H 2 O 16Rb + S 8 → 8Rb 2 S CaO + H 2 O → Ca(OH) 2

7. Decomposition Reactions In a decomposition reaction, a single compound undergoes a reaction that produces two or more simpler substances. AX → A + X 2H 2 O → 2H 2 + O 2 2HgO → 2Hg + O 2 2KClO 3 → 2KCl + 3O 2

8. Single-Replacement Reactions In a single-replacement reaction, one element replaces a similar element in a compound. A + BX → AX + B Mg + 2HCl → MgCl 2 + H 2 Cl 2 + 2KBr → 2KCl + Br 2 2Al + 3Pb(NO 3 ) 2 → 3Pb + 2Al(NO 3 ) 3

9. Double-Replacement Reactions In a double-replacement reaction, the ions of two compounds exchange places in an aqueous solution to form two new compounds. AX + BY → AY + BX HCl + NaOH → NaCl + H 2 O 2KI + Pb(NO 3 ) 2 → PbI 2 + 2KNO 3 FeS + 2HCl → H 2 S + FeCl 2

10. Combustion Reactions In a combustion reaction, a carbon- containing substance combines with oxygen to produce carbon dioxide and water, and releasing a large amount of energy in the form of light and heat. CX + O 2 → CO 2 + H 2 O CH 4 + 2O 2 → CO 2 + 2H 2 O C 3 H 6 + 5O 2 → 3CO 2 + 4H 2 O