Oxidation and Reduction

What is the species that lose electrons in a redox reaction?

• oxidizing agent
• reducing agent
• is reduced
• decreases in oxidation number

What is the species that gain electrons in a redox reaction?

• oxidizing agent
• reducing agent
• is oxidized
• increases in oxidation number

What is the oxidizing agent of this reaction?

3Mg + N₂−−−−> Mg₃N₂

• Mg

• N₂

• Mg₃N₂

• MgN

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the reducing agent of this reaction?
2Al_(s) + 6H⁺_(aq) −−−> 2Al³⁺ _(aq) + 3H_2(g)

• H⁺
• Al³⁺
• Al
• H₂

Tags

NGSS.HS-PS1-2

Which species undergoes a loss of electrons?

Fe_(s) + Cl_2(g)−−−>Fe²⁺_(aq) + Cl^- _(aq)

• Fe

• Fe²⁺

• Cl₂

• Cl^-

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which species undergoes a gain of electrons?

Zn_(s) + Mg²⁺_(aq) −−−> Zn²⁺_(aq) + Mg _(s)

• Zn

• Mg²⁺

• Zn²⁺

• Mg

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

Tags

NGSS.HS-PS1-2

What is the oxidation number of H in CH₄?

• -1
• +1
• -4
• +4

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

• Reduced
• Synthesized
• Oxidized
• None of the above

What element always has an oxidation number of -1?

• Hydrogen
• Fluorine
• Chlorine
• Iodine