CHEM 104 Chemistry II Exam 4: Portage Learning Questions & Answers with Rationales

This comprehensive CHEM 104 Module 4 Exam guide features actual Portage Learning exam questions with detailed answers and rationales covering all key chemistry topics: Electrochemistry (cell diagram Cd|Cd²⁺||Ni²⁺|Ni, anode half-reaction oxidation Cd → Cd²⁺ + 2e⁻, cathode half-reduction Ni²⁺ + 2e⁻ → Ni, overall cell reaction Cd + Ni²⁺ → Ni + Cd²⁺, cell potential calculation E°cathode - E°anode = (-0.23) - (-0.40) = +0.17V spontaneous voltaic cell), Redox Reactions (oxidation of C8H18 to CO2, reduction of O2 to H2O, oxidizing agent O2, reducing agent C8H18 in combustion reaction 2C8H18 + 25O2 → 16CO2 + 18H2O), Electrolytic vs. Voltaic Cells (oxidation half-reaction at anode, electrolytic production of aluminum as largest consumer of industrial electricity), Nernst Equation (Q calculation [Mg²⁺]/[Sn²⁺] = 0.30/0.10 = 3, E°cell = Ecathode - Eanode = -0.14 - (-2.37) = 2.23V, Ecell = 2.23 - (0.0592/2 × log 3) = 2.216V), Multiple Choice Questions (hydrogen ions H⁺ and H⁻ both correct, Saturn has significant hydrogen atmosphere due to large gravitational pull, deuterium is ²H, mineral as naturally occurring solid inorganic compound, thermometallurgy roasting process, ductile metals can be pulled into long strings, all Li/Na/K are alkali metals, hydrogen gas evolved when alkali metals react with water, Na₂CO3 used in water softening, KNO₃ in gunpowder, Mg(OH)₂ in milk of magnesia, Mg₃N₂ produced when magnesium burns in air, CO₂ in fire extinguishers, Al₂O₃ from aluminum reacting with air, nonmetals form only negative charges not positive, graphite as non-toxic carbon allotrope, nitrogen critical component of ammonia and hydrazine, white/red/black phosphorus allotropes, oxygen has six valence electrons, SO₂ and SO₃ as common oxides of sulfur). Perfect for Portage Learning CHEM 104 students preparing for Module 4 Exam, final exam, or chemistry II comprehensive assessment — all answers include correct options + detailed rationales.