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Portage chemistry test 4 2024/2025 graded A+ by experts
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Portage chemistry test 4 2024/2025 graded A+ by experts
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Portage chemistry test 4Voltaic cell - ANSgenerate electrical energy through spontaneous chemical reactions
Electrolytic cells - ANSuses electrical energy to drive nonspontaneous chemical reactions
What electrochemical half-reaction occurs at the anode - ANSOxidation
What electrochemical half-reaction occurs at the cathode - ANSReduction
Why is the lead-acid battery secondary/storage battery - ANSBecause it is rechargeable
Why is the alkaline dry-cell battery called a primary battery and what must be done after
discharge? - ANSbecause it can't be recharged and after it is discharged it needs to be
disposed of
Why is the lithium ion battery useful for powering phones and laptops - ANSbecause it can be
recharged a lot of times.
What type of battery is used in electric vehicles, emergency backup lighting, and power tools -
ANSThe nickle-metal hydride (NiMH) battery
In what kind of battery are the reactants fed in, avoiding the formation of a dead battery? -
ANSThe fuel cell
What better is used as a car battery - ANSThe lead acid battery
What battery is used on many household electronic devices like TV remotes - ANSThe alkaline
dry cell battery
What battery is used to power electronic devices like laptops and cellphones - ANSThe lithium
ion battery
What battery is used in electrical vehicles and backup emergency lighting? - ANSNickel metal
hydride battery
In what kind of battery are the reactants fed in, avoiding the formation of a dead battery? -
ANSThe fuel cell
What electrochemical process is the largest consumer of industrial electricity in North America?
- ANSThe electrolytic production of Aluminum
, The reaction shown below is used in what electrolytic process?
2 NaCl + 2 H2O → 2 NaOH + Cl2(g) + H2(g) - ANSThe electrolysis of brine
The reaction shown below is used in what electrolytic process?
2Al + 3H2O = Al2O3 + 3H2 - ANSAnodizing
What electrochemical process is used to make the surface of metals resistant to corrosion by
creating a thick coating of aluminum oxide? - ANSAnodizing
The anode half-reaction shown below is used in what electrolytic process?
Ag → Ag+ + 1e- - ANSElectroplating
What electrochemical process is used to make silver-coated eating utensils (silverware) -
ANSElectroplating
The reaction shown below is used in what electrolytic process?
2 Na+ + 2 Cl- → 2 Na + Cl2(g) - ANSThe electrometallurgy production of sodium
In the electrochemical production of sodium, why must Na and Cl2 products be kept separate
from one another? - ANSNa and Cl2 must be kept separated from each other so they will not
form NaCl2.
Metallurgy - ANSThe science and process of separating metals from their natural sources for
practical use
Alloys - ANSMixtures of metals, or a metal and another element
Mineral - ANSa naturally occurring solid inorganic compound that can have varying elemental
composition
Ore - ANSMineral deposits that have a concentrated amount of the metal
Gangue - ANSUndesired materials that accompany ore
What is the most processed metal due to its use in steel and other products - ANSIron
pyrometallurgy - ANSThe use of high temperature to purify metals from ore
Smelting - ANSA type of pyrometallurgy that involves the chemical alteration of ore where the
products separate into two or more layers
Roasting - ANSA process where chemical reactions take place between the ore and the
surface. Result in many instances is free metals.
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