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eraser
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fairy
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25
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fairy
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baam
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20
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What is the half reaction that occurs at the cathode for Al2O3
Al3+ + 3e- --> Al(s)
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15
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What is: a state of balance between continuing processes.
dynamic equilibrium
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25
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When a sodium chloride solution is electrolysed, why is hydrogen produced instead of sodium metal?
hydrogen ions are discharged more readily than sodium ions
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baam
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gold
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rocket
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thief
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15
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Predict products: magnesium + copper sulfate -->
copper + magnesium sulfate
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10
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Why are articles electroplated? [two reasons]
To prevent corrosion and to make them attractive
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15
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a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably. What is this?
ore
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15
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electrolysis can only occur in
any of the other choices
gases
solutions or liquids
solids
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20
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State the entire electro-chemical series of metals in proper order.
K, Ca, Na, Mg, Al, Zn, Fe, Pb, [H], Cu, Hg, Ag
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seesaw
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star
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gift
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lifesaver
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10
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State the charge of the electrode where oxidation takes place.
Positive
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15
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What is meant by the degree of dissociation?
It is the extent to which an electrolyte breaks up into ions
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lifesaver
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rocket
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fairy
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lifesaver
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15
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What is bioleaching?
use bacteria to convert copper into gold
using enzymes to do metal plating
use bacteria to shine metals
extract metals in ores using microorganisms to oxidize metal
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10
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What type of ion is F-?
anion
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