Purpose: Verify SCH3U redox basics, ionic charges, and stoichiometry before electrochemistry.
Q1 — Charges
Predict the typical ionic charge for: Na, Mg, Al, O, Cl.
Reveal
+1, +2, +3, −2, −1.
Q2 — Definitions
Define oxidation and reduction in terms of electrons.
Reveal
OIL RIG — Oxidation Is Loss of e⁻; Reduction Is Gain of e⁻.
Q3 — Identify
Mg + Cu²⁺ → Mg²⁺ + Cu. Which species is oxidized?
Reveal
Mg (loses 2 e⁻).
Q4 — Activity series
Will Cu metal react with ZnSO₄? Why or why not?
Reveal
No — Cu is below Zn in the activity series; Zn²⁺ is a weaker oxidant than Cu²⁺.
Q5 — Stoichiometry
How many moles of e⁻ to reduce 0.50 mol Al³⁺ to Al?
Reveal
1.5 mol e⁻ (3 e⁻ per Al³⁺).
Q6 — Reflection
Have you seen batteries explained electrochemically? List one battery type you'd like to understand.
Q7 — Conversion
Convert 5.00 A flowing for 10.0 minutes into coulombs.
Reveal
Q = It = 5.00 × 600 = 3000 C.
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