Friday Mini Review

Another name for a "oxidation-reduction" reaction is

• chemical reaction
• neutralization reaction
• redox reaction
• nuclear reaction

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

Which statement is true:
Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons
• Mg_²⁺ loses 2 electrons
• Mg loses 1 electron
• Mg loses 2 electrons

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-
• Pb⁴⁺ + 2e^- →Pb²⁺
• 2O^-2 →O₂ + 4e^-
• Fe + 3e^- →Fe³⁺

In the reaction
2Ca(s) + O₂(g) --> 2CaO(s), calcium is __________

• Reduced
• Synthesized
• Oxidized
• None of the above

Substance that oxidizes another substance by accepting its electrons.

• reducing agent

• oxidation number

• combustion

• oxidizing agent

Oxidation states for

NaBr

• Na=+1, Br=-1

• Na=+1, Br=-7

• Na=+2, Br=-2

• Na=+1, Br=-2

Oxidation state for

I₂

• I=-1

• I=0

• I=+7

• I=-2

Which is oxidized and which is reduced?

Ca + Na₂O → Na + CaO

• Oxidized: Na Reduced: O

• Oxidized: Ca Reduced: O

• Oxidized: Na Reduced: Ca

• Oxidized: Ca Reduced: Na