Do Now - AP - Redox Reactions

The oxidation state of selenium in NaSeO₃ is

• +5

• +3

• +7

• -5

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

• reduced

• oxidized

• electrolyzed

• synthesized

In the reaction N₂(g) + 3 H₂(g) --> 2 NH₃(g), nitrogen is __________.

• reduced

• oxidized

• electrolyzed

• synthesized

Oxygen usually has an oxidation number of ___ when it is combined with other elements in a compound.

• +6

• -6

• +2

• -2

Elements not combined with other elements in a compound have an oxidation number of ____.

• Depends on their group on the periodic table

• +1

• 0

• = to the number of valence elections

• +3

• -5

• +5

• -3

• -1

• +7

• +1

• -7

In the reaction Zn + 2HCl --> ZnCl₂ + H₂

which element, if any, is oxidized?

• Zinc

• Hydrogen

• Chlorine

• None

What element is being Oxidized?

• N
• H
• O
• S

What is the oxidation number of chlorine in HClO?

• 0

• -1

• +1

• +5