Simple chemical cell

What is the energy conversion in a chemical cell?

• from chemical energy to electrical energy

• from electrical energy to chemical energy

In a chemical cell, electrons flow from the positive electrode to the negative electrode in the external circuit.

• True

• False

For a simple chemical cell, the farther apart the two metals are in the electrochemical series, the higher the voltage of the cell.

• True

• False

In a Daniell cell, the negative electrode is a zinc strip and the positive electrode is a copper container.

• True

• False

A salt bridge can be prepared by soaking a piece of filter paper in sugar solution.

• True

• False

A salt bridge provides ions that move into the half-cells to prevent the build-up of excess positive or negative ions in the solution of each half-cell.

• True

• False

In which of the following cells will the light bulb shine most brightly?

• 
• 
• 
• 

Which of the following metals loses electrons to form ions most readily?

• Zinc

• Copper

• Magnesium

• Silver

Consider the chemical cell shown above. Electrons flow from the strip of metal X to the copper strip in the external circuit.

Which of the following statements concerning the above set-up is correct?

• The copper strip is the positive electrode.

• The mass of the copper strip decreases.

• The mass of metal X increases.

• Copper is at a higher position in the electrochemical series than metal X.

Consider the above lemon cell:

The voltage of the cell can be increased by

• increasing the distance between the zinc and copper strips.

• decreasing the length of the zinc and copper strips in the lemon.

• replacing the lemon by an apple.

• replacing the zinc strip with a magnesium strip.