Unit 12 Quizizz 1: Electrochemistry Intro

Electrons always flow from

• cathode to anode

• anode to cathode

What element is being Oxidized?

• N

• H

• O

• S

What element is being Reduced?

• N
• H
• O
• S

What element is being Oxidized?

• I
• H
• S
• O

What is oxidation number of Cr in Cr₂O_7^2-?

• -2
• +2
• +6
• +12

If an atom loses electrons during a chemical reaction, the atom was:

• Oxidized
• Reduced
• Neutralized
• Precipitated

What substance is oxidized in the following reaction?
4Fe + 3O₂ --> 2Fe₂O₃

• Iron
• Fluorine
• Oxygen

What is an anode?

• It is the electrode where oxidation takes place.

• It is the electrode where reduction takes place.

• It is an aqueous solution containing an electrode.

• It is the salt bridge that connects half-cells.

In the following reaction

Sn⁺² + 2Fe⁺³ → Sn⁺⁴ + 2Fe⁺²

the species being reduced is....

• Sn⁺⁴

• Sn⁺²

• Fe⁺³

• Fe⁺²

Mg + PbCl₂ → MgCl₂ + Pb

Which statement correctly describes the oxidation and reduction that occur?

• Mg is oxidized and Pb⁺² is reduced

• Mg is oxidized and Cl^- is reduced

• Mg is reduced and Cl^- is oxidized

• Mg is reduced and Pb⁺² is oxidized