Which statement accurately describes the function of an electrolyte in a simple cell?

It conducts electricity between two electrodes.
It stores energy for later use.
It prevents the flow of current.
It increases the cell's overall voltage.

Arrange the stages in the reaction within a hydrogen fuel cell in the correct order.

Formation of water
Production of electrons
Oxidation of hydrogen

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Use some of the following answers to fill in the blanks:
Electricity, electrolyte, voltage, electrode, metals, cells

The voltage of a cell depends on factors like the type of and used in the cell.

What is produced as a result of the reaction in a hydrogen fuel cell?

Water
Oxygen
Carbon dioxide
Nitrogen

Select all statements that correctly describe non-rechargeable batteries:

They stop working when one reactant is used up.
Their chemical reactions are not reversible.
They produce energy continuously without limit.
They are often alkaline batteries.

Use some of the following answers to fill in the blanks:
Chemical, fuel, electrical, hydrogen, carbon

Fuel cells use as a and produce an current through a reaction.

Which type of reaction takes place in a hydrogen fuel cell to produce a potential difference?

Oxidation
Reduction
Evaporation
Electrolysis

What is a key advantage of hydrogen fuel cells over rechargeable batteries?

Produces only water as a by-product
Requires frequent recharging
Consumes high amounts of oxygen
Limited availability of hydrogen fuel

Select all correct statements about hydrogen fuel cells.

Hydrogen fuel cells produce water as a by-product.
They are a potential alternative to rechargeable batteries.
They can store energy indefinitely without fuel.
They generate electricity through the oxidation of hydrogen.

Use some of the following answers to fill in the blanks:
Series, cells, voltage, metals, fuel

A battery consists of multiple connected in to increase the output.

What is required for a fuel cell to operate effectively?

Oxygen
Carbon dioxide
Sodium
Nitrogen

Identify the half equation for the oxidation of hydrogen at the anode in a hydrogen fuel cell.

H₂ → 2H⁺ + 2e⁻
O₂ + 4e⁻ → 2O²⁻
2H₂O → O₂ + 4H⁺ + 4e⁻
H₂O → H₂ + O₂

Identify the half equation for the reduction of oxygen at the cathode in a hydrogen fuel cell.

O₂ + 4H⁺ + 4e⁻ → 2H₂O
2H₂ + O₂ → 2H₂O
H₂ + 2e⁻ → H₂O
O₂ + H₂ → H₂O

Select all factors that impact the voltage produced by a simple cell.

Type of electrode material
Type of electrolyte
Temperature of the cell
Distance between electrodes

Match each type of battery with its characteristic.

Recharges by reversing chemical reactions
Typically non-rechargeable
Produces only water as a by-product

Rechargeable battery
Alkaline battery
Hydrogen fuel cell

Use some of the following answers to fill in the blanks:
Half, hydrogen, oxidation, water, carbon dioxide

In a hydrogen fuel cell, the of produces a potential difference and as a by-product.

Use some of the following answers to fill in the blanks:
Depleted, reverse, non-rechargeable, rechargeable, complete, single-use

A battery will stop producing electricity once a reactant is , while a battery can continue to function after using an external current to the reaction.

Cells, Batteries and Fuel Cells Quiz

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