2. Quiz #1 Chemical Rxns and Safety 1.Do you light gas jets or Bunsen Burners? Explain. 2.What is the correct way to write the formula for fluorine? 3.In the formula NH 4 C 2 H 3 O 2 What elements are present? 4.How many of each element is present in the formula of ammonium acetate (in question 3)? 5.Balance the following: __Ca + __N 2  __Ca 3 N 2 6.What does H 2 O (l) symbolize? 7.Predict the following reaction: Ca + F 2  ______ 1.You light Bunsen burners so the flame goes up, not toward you, and so the flames don’t travel into the pipes and explode the room. 2.F 2 3.N, C, H, and O 4.1 N, 2 C, (3 + 4 =) 7 H, 2 O 5. 3 Ca + N 2  Ca 3 N 2 6.H 2 O (l) = liquid water 7.Ca + F 2  CaF 2

3. Practice Active metal oxides react with water to form hydroxides. ex: Na 2 O + H 2 O  ________ Many oxides of nonmetals react with water to form oxyacids. ex: SO 2 + H 2 O  _________ Some metal oxides react with nonmetal oxides to form salts. Na 2 O + SO 2  ________ Active metals react with halogens to form salts. __Na + Cl 2-  2NaOH H 2 SO 3 Na 2 SO 3 2 NaCl2

4. Decomposition AX  A + X 2H 2 O  2H 2 + O 2 O H H O H H Electrolysis: decomposition of a substance by an electric current.

5. Decomposition AX  A + X 2HgO  2Hg + O 2 O Hg O This reaction occurs when you heat orange colored mercury (II) oxide. Silver mercury and oxygen gas form.

6. Decomposition of metal carbonates ACO 3  AO + CO 2 (g) CaCO 3 (s)  CaO (s) + CO 2 (g) O Ca O This reaction occurs when you heat calcium carbonate. calcium oxide and carbon dioxide form. O C

7. Decomposition of metal hydroxides AOH  AO + CO 2 (g) Ca(OH) 2 (s)  CaO (s) + H 2 O (g) H Ca O This reaction occurs when you heat calcium hydroxide calcium oxide and water form. O H

8. Decomposition of metal chlorates AClO 3  ACl + O 2 (g) 2KClO 3 (s)  2KCl (s) + 3O 2 (g) K O This reaction occurs when you heat potassium chlorate. potassium chloride and oxygen form. Cl O K O O O O

9. Decomposition of acids H 2 CO 3 (aq)  H 2 O (g) + CO 2 (g) Carbonic acid decomposes when warmed. water and carbon dioxide form. O O O C H H

10. Practice Na 2 CO 3  FeO  CaCO 3  NaCl  ZnCl 2  MgCO 3 Na 2 CO 3  Na 2 O + CO 2 2 FeO  2 Fe + O 2 CaCO 3  CaO + CO 2 2 NaCl -> 2Na + Cl 2 ZnCl 2  Zn + Cl 2 MgCO 3  MgO + CO 3

11. More Practice __NaOH  __Fe(OH) 3  __CaCO 3  __NaClO 3  __Zn(ClO 3 ) 2  __Mg(OH) 2 2 NaOH  Na 2 O + H 2 O 3 Fe(OH) 3  3 Fe 2 O + 6H 2 O Ca(ClO 3 ) 2  CaCl 2 + 3 O 2 2 NaClO 3 -> 2NaCl + 3 O 2 Zn(ClO 3 ) 2  ZnCl 2 + 3 O 2 Mg(OH) 2  MgO + H 2 O

12. Single Displacement A+ BX  AX + B or: Y + BX  BY + X Replacement of a metal in a compound by another metal. 2 Al (s) + 3Pb(NO 3 ) 2  3Pb +2 Al(NO 3 ) 3 Al Pb 2+ N O O O N O O O N O O O N O O O N O O O N O O O

13. Single Displacement A+ BX  AX + B or: Y + BX  BY + X Replacement of a metal in a compound by another metal. 2 Al (s) + 3Pb(NO 3 ) 2  3Pb +2 Al(NO 3 ) 3 Al 3+ Pb N O O O N O O O N O O O N O O O N O O O N O O O

14. Single Displacement A+ BX  AX + B or: Y + BX  BY + X Replacement of a hydrogen in a compound by a metal. 2 Na (s) + 2 H 2 O (l)  2 NaOH (aq) + H 2 (g) Na O H H O H H

15. Single Displacement A+ BX  AX + B or: Y + BX  BY + X Replacement of a hydrogen in a compound by a metal. Mg (s) + 2 HCl (aq)  MgCl 2 (aq) + H 2 (g) Mg Cl H H

16. Single Displacement A+ BX  AX + B or: Y + BX  BY + X Replacement of halogens Cl 2 (g) + 2 KBr (aq)  2 KCl (aq) + Br 2 (g) Cl K Br K Cl

17. Double Replacement Reactions (double displacement) Formation of a precipitate. 2 KI (aq) + Pb(NO 3 ) 2 (aq)  PbI 2 (s) + 2 KNO 3 (aq) K K I Pb 2+ N O O O N O O O I

18. Double Replacement Reactions (double displacement) Formation of a gas. FeS (s) + 2 HCl(aq)  H 2 S (g) + FeCl 2 (aq) Fe 2+ S Cl H H

19. Double Replacement Reactions (double displacement) Formation of a water. NaOH (s) + HCl(aq)  H 2 O (l) + NaCl 2 (aq) Na + Cl H O H

20. Combustion Reactions A substance combines with oxygen, releasing a large amount of energy in the form of light and heat. 2 H 2 (g) + O 2 (g)  2 H 2 O O H H O H H

21. Combustion Reactions A substance combines with oxygen, releasing a large amount of energy in the form of light and heat. C 3 H 8 (g) +5 O 2 (g)  4 H 2 O + 3 CO 2 C CC H H H H H H H H O O O O O O O O O O

22. Combustion Reactions A substance combines with oxygen, releasing a large amount of energy in the form of light and heat. C 3 H 8 (g) +5 O 2 (g)  4 H 2 O + 3 CO 2 C C C H H H H H H H H O O O O O O O O O O