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Quiz #1 Chemical Rxns and Safety

Do you light gas jets or Bunsen Burners? Explain. What is the correct way to write the formula for fluorine? In the formula NH 4 C 2 H 3 O 2 What elements are present? How many of each element is present in the formula of ammonium acetate (in question 3)? Balance the following:

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Quiz #1 Chemical Rxns and Safety

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  1. Do you light gas jets or Bunsen Burners? Explain. What is the correct way to write the formula for fluorine? In the formula NH4C2H3O2 What elements are present? How many of each element is present in the formula of ammonium acetate (in question 3)? Balance the following: __Ca + __N2 __Ca3N2 What does H2O (l) symbolize? Predict the following reaction: Ca + F2______ 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. F2 N, C, H, and O 1 N, 2 C, (3 + 4 =) 7 H, 2 O 3 Ca + N2 Ca3N2 H2O (l) = liquid water Ca + F2  CaF2 Quiz #1 Chemical Rxns and Safety

  2. Practice • Active metal oxides react with water to form hydroxides. ex: • Na2O + H2O  ________ • Many oxides of nonmetals react with water to form oxyacids. ex: • SO2 + H2O  _________ • Some metal oxides react with nonmetal oxides to form salts. • Na2 O + SO2  ________ • Active metals react with halogens to form salts. • __Na + Cl2-  2NaOH H2SO3 Na2SO3 2 2 NaCl

  3. DecompositionAX  A + X • 2H2O  2H2 + O2 H O H H O H Electrolysis: decomposition of a substance by an electric current.

  4. DecompositionAX  A + X • 2HgO  2Hg + O2 Hg O This reaction occurs when you heat orange colored mercury (II) oxide. Silver mercury and oxygen gas form. Hg O

  5. Decompositionof metal carbonatesACO3 AO + CO2(g) • CaCO3 (s) CaO (s) + CO2(g) O Ca This reaction occurs when you heat calcium carbonate. calcium oxide and carbon dioxide form. C O O

  6. Decompositionof metal hydroxidesAOH  AO + CO2(g) • Ca(OH)2 (s) CaO (s) + H2O (g) H O Ca This reaction occurs when you heat calcium hydroxide calcium oxide and water form. O H

  7. Decomposition of metal chloratesAClO3 ACl + O2(g) • 2KClO3 (s) 2KCl (s) + 3O2(g) O O Cl Cl K K O O This reaction occurs when you heat potassium chlorate. potassium chloride and oxygen form. O O

  8. Decomposition of acidsH2CO3 (aq) H2O (g) + CO2(g) O H H C Carbonic acid decomposes when warmed. water and carbon dioxide form. O O

  9. Na2CO3 FeO  CaCO3  NaCl  ZnCl2 MgCO3 Na2CO3 Na2O + CO2 2 FeO  2 Fe + O 2 CaCO3  CaO + CO2 2 NaCl -> 2Na + Cl2 ZnCl2  Zn + Cl2 MgCO3  MgO + CO3 Practice

  10. __NaOH  __Fe(OH)3  __CaCO3  __NaClO3  __Zn(ClO3)2  __Mg(OH)2 2 NaOH  Na2O + H2O 3 Fe(OH)3  3 Fe2O + 6H2O Ca(ClO3)2  CaCl2 + 3 O2 2 NaClO3 -> 2NaCl + 3 O2 Zn(ClO3)2  ZnCl2 + 3 O2 Mg(OH)2  MgO + H2O More Practice

  11. O O O O O O N N N N N N O O O O O O O O O O O O Single DisplacementA+ BX AX + Bor:Y + BX  BY + X • Replacement of a metal in a compound by another metal. 2 Al (s) + 3Pb(NO3)2 3Pb +2 Al(NO3)3 Pb2+ Al Pb2+ Al Pb2+

  12. O O O O O O N N N N N N O O O O O O O O O O O O Single DisplacementA+ BX AX + Bor:Y + BX  BY + X • Replacement of a metal in a compound by another metal. 2 Al (s) + 3Pb(NO3)2 3Pb +2 Al(NO3)3 Pb Al3+ Al3+ Pb Pb

  13. Single DisplacementA+ BX AX + Bor:Y + BX  BY + X • Replacement of a hydrogen in a compound by a metal. 2 Na (s) + 2 H2O (l) 2 NaOH (aq) + H2(g) H O Na Na H H O H

  14. Single DisplacementA+ BX AX + Bor:Y + BX  BY + X • Replacement of a hydrogen in a compound by a metal. Mg (s) + 2 HCl (aq) MgCl2(aq) + H2(g) Cl Mg H Cl H

  15. Single DisplacementA+ BX AX + Bor:Y + BX  BY + X • Replacement of halogens Cl2(g) + 2 KBr (aq) 2 KCl (aq) + Br2(g) Br Cl K Cl Br K

  16. O O N N O O O O Double Replacement Reactions (double displacement) • Formation of a precipitate. • 2 KI (aq) + Pb(NO3)2 (aq)  PbI2 (s) + 2 KNO3 (aq) I Pb2+ I K K

  17. Double Replacement Reactions (double displacement) • Formation of a gas. • FeS (s) + 2 HCl(aq)  H2S (g) + FeCl2 (aq) S Fe2+ Cl Cl H H

  18. Double Replacement Reactions (double displacement) • Formation of a water. • NaOH (s) + HCl(aq)  H2O (l) + NaCl2 (aq) H O Na+ Cl H

  19. Combustion Reactions • A substance combines with oxygen, releasing a large amount of energy in the form of light and heat. 2 H2 (g) + O2 (g)  2 H2O O H O H H H

  20. Combustion Reactions • A substance combines with oxygen, releasing a large amount of energy in the form of light and heat. C3H8 (g) +5 O2 (g)  4 H2O + 3 CO2 O O O O H O H H H C O C C O H O H H O H O

  21. Combustion Reactions • A substance combines with oxygen, releasing a large amount of energy in the form of light and heat. C3H8 (g) +5 O2 (g)  4 H2O + 3 CO2 O O H C O O H H H O H H O C H O O C O O H

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