electrolysis😊🔫 Flashcards
DONT PANIC
positive is anode
Negative is Cathode
draw diagram with all labeled.
1.electrolyte mixture of aluminum oxide and cryollite
2.positive carbon anode
3.Negative carbon anode
4.negative carbon cathode
5.steel container
6.tapped of aluminum
what occurs at the anode
oxidation
What occurs at the cathode
Reduction
Why electroplate objects
1.protect against corrosion
2. improve appearance
3.cheaper
Purifying copper step one
a beaker with pure copper rods and impure copper rod is dipped into copper solution.
Purifying copper step two
pure copper is connected to the negative terminal of the battery.
impure copper is connected to the positive terminal od the battery.
purifying copper step three
pure copper increase in size while impure copper decreases in size
and an anode sludge forms at the bottom of the beaker
Extraction of aluminum step one
twhat hahe ore is crushed and mixed with sodium hydroxide. Aluminum oxide reacts with sodium hydroxide and dissolve.
Al2O3(s)+2NaOH(aq)—>2NaAlO2(aq)+H20(l)
EOA step two
dissolving aluminum oxide in the cryolite, the melting point of electrolysis is lowered
EOA step 3 cathode
at the cathode aluminum ions gain electrons
Al3+3e- —–>Al
EOA step 4
a the anode oxygen ions loss electrons
202- —–>02 +4e-
overall equation EOA
Al3+ + 3e− → Al
2O2- → 4e− + O2
2Al2O3 → 4Al + 3O2
what ways do electrons move in electrolysis
from the anode to the cathode
what happens o ionic compounds in electrolysis
they are decomposed
