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Given the reaction: 2Na +2H2O --> 2Na+ + 2OH- + H2. which substance is oxidized?
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
Given the reaction: Ca(s) + Cu^2+(aq) --> Ca^2+(aq) + Cu(s). What is the correct reduction half-reaction?
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
In an electrolytic cell, oxidation takes place at the
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
Which half-reaction correctly represents reduction?
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
Which half-reaction correctly represents a reduction reaction?
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
In which compound does sulfur have an oxidation number of -2?
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
Which equation represents a redox reaction?
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
In an electrolytic cell, to which electrode will a positive ion migrate and undergo reduction?
the cathode, which is negatively charged
Na
anode, which is positive
Br2^0 + 2e- --> 2Br-
Fe^2+ + 2e- --> Fe^0
Na2S
Cu + 2Ag+ + 2NO3^- --> 2Ag + Cu^2+ + 2NO3^-
Cu^2+(aq) + 2e- --> Cu(s)
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