🧪 Chemistry Quiz 19: Oxidation, Reduction, and Electron Transfer

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🧪 Chemistry · Quiz 019

Establish oxidation-state and electron-transfer reasoning as the conceptual foundation for electrochemical cells.

Learning goalIdentify oxidation and reduction, assign oxidation states, classify redox roles, and track electron transfer quantitatively.

  • 5 questions
  • Applied understanding
  • Explanations after finishing
Answered 0/5
FoundationWhich statement correctly defines oxidation and reduction in electron-transfer terms?
Need a small nudge?

Recall the paired electron bookkeeping: one species gives electrons and another receives them.

UnderstandingWhat is the oxidation state of manganese in MnO₄⁻?
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Let manganese be x, assign oxygen its usual −2 oxidation state, and make the sum equal the ion's −1 charge.

ApplicationFor Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s), which identification is correct?
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Track which species loses electrons and which gains them, then connect each reactant to the agent role it performs on the other.

InterpretationIn 2H₂O₂ → 2H₂O + O₂, oxygen in H₂O₂ has oxidation state −1. What type of redox behavior occurs?
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Compare oxygen's oxidation state in both products with its −1 state in the single reactant.

ConnectionFor the balanced reaction 2Al(s) + 3Cl₂(g) → 2AlCl₃(s), how many moles of electrons are transferred per stoichiometric reaction as written?
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Determine the oxidation-state change for each aluminum atom, then multiply by its stoichiometric coefficient.

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