PORTAGE LEARNING CHEM 104 EXAMS SET 2026 QUESTIONS AND CORRECT ANSWERS

PORTAGE LEARNING CHEM 104 EXAMS SET
2026 QUESTIONS AND CORRECT ANSWERS


◉ Oxidation number for HBr . Answer: H: +1
Br: -1


◉ Oxidation numbers for HNO3 . Answer: H: +1
N: +5
O: -2


◉ Redox Reaction Definition . Answer: Type of reaction involving the
transfer of electrons between two species


◉ Define oxidation . Answer: loss of electrons


◉ Define reduction . Answer: gain of electrons


◉ Ag + Au^+1 = Ag^+1 +Au . Answer: Ag: oxidized (lost electron)
Au: reduced (gained electron)


◉ Write half reactions for:

, Ag + Au^+1 = Ag^+1 +Au . Answer: Ag = Ag^+1 + 1e-
Au^+1 + 1e- = Au


◉ electrochemical cell . Answer: Device that contains the reactants and
products of a redox system, but prevents physical contact between the
reactants the transfer of electrons is indirect and requires an external
circuit


◉ Galvanic cell . Answer: An electrochemical cell in which a
spontaneous redox reaction takes place


◉ Half cell . Answer: Contains the redox conjugate pair of a single
reactant (there's two per galvanic cell)


◉ Anode . Answer: The cell that contains the oxidation reaction


◉ Cathode . Answer: The cell that contains the reduction reaction


◉ Salt bridge . Answer: A tube filled with inert electrolyte solution that
connects the anode and the cathode


◉ Inert electrode . Answer: Provides or accepts electrons in the redox
reaction