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14 cards from this deck
Water produces H+H^+H+ and OH−OH^-OH− ions that react at electrodes
H+H^+H+ and OH−OH^-OH−
Less reactive ion
Cu2+Cu^{2+}Cu2+ (copper less reactive than hydrogen)
Solid copper
Cu2+(aq)+2e−→Cu(s)Cu^{2+}(aq) + 2e^- \rightarrow Cu(s)Cu2+(aq)+2e−→Cu(s)
Oxygen gas (and water)
H+H^+H+ (sodium more reactive than hydrogen)
Hydrogen gas
2H+(aq)+2e−→H2(g)2H^+(aq) + 2e^- \rightarrow H_2(g)2H+(aq)+2e−→H2(g)
Chlorine gas
2Cl−(aq)→Cl2(g)+2e−2Cl^-(aq) \rightarrow Cl_2(g) + 2e^-2Cl−(aq)→Cl2(g)+2e−
When present (preferentially over OH−OH^-OH−)
If no halide ions present (produces oxygen gas)
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