Electrochemistry and batteries

What is oxidation number of Fe in FeO ?

• +2
• -2
• 0
• +1

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which of the following is the balanced half -reaction for the oxidation of Cu to Cu^+2?

• Cu   --> Cu⁺²
• Cu + 2 e-   --> Cu⁺²
• Cu  --> Cu⁺²  + 2 e-
• Cu - 2e-  --> Cu⁺²

Tags

NGSS.HS-PS1-2

Oxygen always has an oxidation number of...

• -1
• 1
• 2
• -2

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

A group of cells that are connected together

• anode
• battery
• salt bridge
• half cell

The process in which electrical energy is used to bring about a chemical change

• fuel cell
• battery
• electrolysis
• voltaic cell

Tags

NGSS.HS-PS2-5

An electrochemical cell that is used to convert chemical energy into electrical energy

• electrolysis
• electrode
• voltaic cell
• anode

Tags

NGSS.HS-PS2-5

The electrode at which reduction occurs

• cathode
• anode
• salt bridge
• electrode

Tags

NGSS.HS-PS2-5

What occurs to the mass of copper electrode in the following reaction?
Zn/Zn+2 // Cu+2/Cu

• increases
• decreases
• remains the same

Tags

NGSS.HS-PS1-7

What occurs to the mass of zinc electrode in the following reaction?
Zn/Zn+2 // Ag+1 / Ag

• increases
• decreases
• remains the same

Tags

NGSS.HS-PS1-7

Which type of electrochemical cell is used as a battery?

• voltaic
• electrolytic

Tags

NGSS.HS-PS3-3