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Memorization Quiz #2

Memorization Quiz #2. Warmup: Write a balanced equation for the reaction that occurs when:. Liquid carbon disulfide reacts with oxygen gas to produce carbon dioxide and sulfur dioxide gas . CS 2 ( l ) + O 2 ( g )  CO 2 ( g ) + SO 2 ( g )

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Memorization Quiz #2

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  1. Memorization Quiz #2

  2. Warmup: Write a balanced equation for the reaction that occurs when: Liquid carbon disulfide reacts with oxygen gas to produce carbon dioxide and sulfur dioxide gas. CS2(l) + O2(g)  CO2 (g) + SO2(g) Solid aluminum metal reacts with aqueous zinc (II) chloride to produce solid zinc metal and aqueous aluminum chloride. Al(s) + ZnCl2(aq)  Zn(s) + AlCl3 (aq) 2 3 2 2 3 3

  3. We may occasionally run into a reaction that does not fit into any category, or fits into several different ones. Don’t stress! The 5 Main Types of Chemical Reactions

  4. Synthesis (Combination): Two (or more) elements combine to form one, complicated compound. A + X AX 2Fe (s) + O2(g)  2FeO (s) 2 reactants 1 product

  5. Predicting Products of Synthesis Reactions: Mg(s)  +  O2(g)  → C(s)  +  O2(g)  → Na(s)  +  Cl2(g)  → 2 MgO(s) CO2(g) NaCl(s) 2 2 2 Predicting products can be tough. I will test you on very obvious ones. For homework and class problems, just try to come up with likely products, ok?

  6. Decomposition Reactions One compound produces two or more simpler substances. A X  A + X CaCO3(s)  CaO(s) + CO2(g) O + O C O C Ca Ca O O O

  7. Predicting Products of Decomposition Reactions: HgO(s)→ (demo!!!) KClO3(s)  → H2SO4(s)  →   Hg(s) + O2(g) KCl(s)  +   O2(g)  H2O(l)  +  SO3(g) 2 2 2 3 2

  8. Single Replacement (Displacement): • one ion replaces a similar ion to make a new compound A + BX AX + B 2Al(s) + 3Pb(NO3)2(aq)  2Al(NO3)3(aq) + 3Pb(s) Notice that nitrate doesn’t separate…

  9. Predicting Products of SR Reactions I2(l)  +   NaBr(aq)  → Zn(s)  +   HCl(aq)  → Fe(s)  +  CuSO4(aq)  → 2 NaI(aq)  +  Br2(l) ZnCl2(aq) + H2(g) FeSO4(aq)  +  Cu(s) 2 2

  10. Double Replacement (Displacement) Reactions: The cations and anions of 2 ionic compounds switch places in an aqueous solution, forming 2 new ionic compounds AX + BY AY + BX NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)

  11. Predicting Products of DR Reactions AlCl3(aq) + Na2SO4(aq) → HCl(aq) + FeS(s) → H2SO4(aq) + NaOH(aq) → (demo on next slide…..) 2 3 NaCl(aq)+ Al2(SO4)3(s) FeCl2(aq) +  H2S(g) 6 2

  12. BEVERAGE MAGIC 1. water to wine 2. wine back to water H2SO4(aq) + NaOH(aq) → HOH(l) + Na2SO4(aq) What type of reaction is this? 3. water to milk Na2SO4(aq) + BaCl2(aq)→ BaSO4(s) + 2NaCl(aq) What type of reaction is this? 4. milk to strawberry shake

  13. Combustion of Hydrocarbons: One reactant mixes with oxygen gas, releasing energy in the form of heat and light. Water vapor is always made. Sometimescarbon dioxide is also made. C3H8(g) + 5O2(g)  3CO2(g) + 4H2O(g)

  14. Predicting Products of Hydrocarbon Combustion C3H7OH(l) + O2(g) → C4H10(g)+ O2(g) →  C12H22O12 + O2 →  Demo on next slide! 8 9 2 CO2(g)+   H2O(g) CO2(g) + H2O(g) 4 6 3 2 13 8 10

  15. The GummiBearElectricChair first reaction: heat + NaClO3→ NaCl + O2 oxygen fuels the second reaction C12H22O12 + O2 → CO2 + H2O + heat 2 2 3 23 2 22 24

  16. Classify each rxn with a buddy, 3 minutes 1. HCl(aq) + FeS(s) → FeCl2(aq)+  H2S(g) 2. C2H2 + O2 CO2 + H2O 3. NaBr + Ca(OH)2CaBr2 + NaOH 4. H3PO4 + LiOH  Li3PO4 + H2O 5. NH3 + H2SO4 (NH4)2SO4 6. AgBr + Hg  HgBr2 + Ag

  17. Write reactants. Predict products. Balance. 1. Sulfuric acid is added to solid calcium phosphate H2SO4(aq) + Ca3(PO4)2(s) → CaSO4 + H3PO4 2. Hydrogen sulfide gas is bubbled into a mercury(II)chloride solution H2S(g) + HgCl2 (aq) → HgS + HCl 3 3 2 2

  18. Write reactants. Predict products. Balance. 3. A bar of zinc metal is immersed in a solution of copper(II) nitrate Zn(s) + Cu(NO3)2(aq) → Zn(NO3)2 (aq) + Cu(s) 4. Ethanol is burned in oxygen C2H5OH(l) + O2(g) → CO2(g) + H2O(g) 3 2 3

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