Hon chem ch 20 pg 655 electrochemical cells
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Hon Chem Ch 20 Pg 655 Electrochemical Cells . AKA batteries Pg 643 Zn is good reducing agent (gets oxidized, loses electrons, ox# goes up) Cu is good oxidizing agent (gets reduced, gains electrons, ox# goes down). Parts and Types of Batteries Pg 656-9. 1. Zinc-Carbon Dry Cell

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Hon Chem Ch 20 Pg 655 Electrochemical Cells

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Hon chem ch 20 pg 655 electrochemical cells

Hon Chem Ch 20 Pg 655Electrochemical Cells

  • AKA batteries

  • Pg 643 Zn is good reducing agent (gets oxidized, loses electrons, ox# goes up)

  • Cu is good oxidizing agent (gets reduced, gains electrons, ox# goes down)


Parts and types of batteries pg 656 9

Parts and Types of BatteriesPg 656-9

1. Zinc-Carbon Dry Cell

a. big, used in flashlights, C and D batteries

b. Zn container – anode, negative, becomes + as loses electron

c. C rod in center – cathode, + bump on end of battery, becomes negative as gains electrons


Hon chem ch 20 pg 655 electrochemical cells

2. Alkaline Batteries

a. smaller, AA and AAA, cameras, remotes

b. Zn and KOH instead of Zn and C

  • Hg Batteries

    a. tiny, hearing aids, watches

    b. Zn, KOH, Steel, HgO


Corrosion and prevention pg 661 2

Corrosion and PreventionPg 661-2

  • Fe is oxidized, loses electrons, forms rust

  • Salt and acid speed up the oxidation

  • Zn coating prevents oxidation due to Pg 643, called galvanizing

  • Electric potential difference = volts (how hard electricity pushes thru wire)


Recharging batteries pg 667 9

Recharging BatteriesPg 667-9

  • Voltaic cell – battery making electricity, anode gives electrons to cathode

  • Electrolytic cell – battery when being recharged, storing electricity, direct current source forces cathode to give electrons back to anode

  • DC sources - wall charger with diode to change AC to DC, car alternator, other battery (jumping a car)

  • Can be recharged as long as enough products to act as reactants to reverse reaction, corrosion is loss of products/reactants so can’t recharge after corroded Pg 669**do redoxrxn for car battery


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