Electrochemical Cells and Hydrogen Oxygen Fuel Cells

What is an electrolyte?

• The liquid part of the electrochemical cell

• The metal part of the electrochemical cell

• The part that measures the voltage in an electrochemical cell

Different pairs of metals produce different voltages.

• True

• False

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

• True

• False

Applications of electrochemical cells include...

• Rechargeable batteries in phones and laptops

• Hydrogen fuel cells in electric cars

• Energy storage systems in the Whitelee Windfarm

• Single-use batteries in TV remotes

Which would be an accurate half-equation at the cathode for aluminum?

• Al³⁺ + 3e^- --> Al

• Al --> Al³⁺ + 3e^-

• Al³⁺ --> Al + 3e^-

• Al + 3e^- --> Al³⁺

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

A redox equation has...

• electrons on the left side

• electrons on the right side

• electrons on both sides

• no electrons on either side

Why does the voltage from a chemical cell that is connected in a circuit with a lamp eventually reach zero?

• The lamp breaks

• One of the reactants is used up

• The circuit becomes broken

What is produced by a hydrogen-oxygen fuel cell?

• Water and Carbon Dioxide

• Carbon Dioxide

• Water