Electrochemical Cells

How do you complete the circuit when using 2 half-cells?

• acid bridge

• base bridge

• salt bridge

Different pairs of metals produce different voltages.

• True

• False

The circuit must be complete for the electrons to flow.

• True

• False

The closer the elements in the Electrochemical Activity Series, the greater the voltage produced.

• True

• False

Electrons will flow from the element higher in the Electrochemical Activity Series to the one lower in the Electrochemical Activity Series.

• True

• False

Atoms of which element can most easily be oxidized?

• Copper
• Zinc
• Iron
• Calcium

Tags

NGSS.HS-PS1-2

The net products that result from the electrolysis of water are?

• H₂ and OH^-
• O and H⁺
• H⁺ and OH^-
• H₂ and O₂

Reactions in voltaic cells are

• spontaneous, redox reactions
• non-spontaneous, redox reactions
• spontaneous, non-redox reactions
• non-spontaneous, non-redox reactions

Which of the following is not a similarity between voltaic and electrolytic cells?

• electrons flow from anode to cathode
• reduction occurs at cathode
• oxidation occurs at anode
• charges on anode and cathode are the same

A hydrogen/aluminum voltaic cell is established to power a torch, as shown.

For this cell, the

• electrons will flow from the aluminium to the hydrogen half-cell

• aluminium electrode will be the positive anode

• concentration of aluminium ions in solution will be falling

• hydrogen half-cell will be the negative cathode