rechargeable cells and batteries

Question 1

Primary cells

Answer 1

-cannot be recharged
-go flat when chemical reaction reaches equillibrium

Question 2

Secondary cells

Answer 2

-can be recharged and reused several times
-to recharge, the cell reaction must occur in reverse
-done by connecting the cell to a charger that provides a greater potential difference than what is produced during discharge

Question 3

For a cell to be recharged…

Answer 3

the products produced during discharge MUST be in contact with the electrode

Question 4

Discharge

Answer 4

-galvanic cell
-spontaneous
-negative terminal is anode
chemical -> electrical
-electrons leave the cell at negative terminal

Question 5

Recharge

Answer 5

-electrolytic cell
-non spontaneous
-positive electrode is anode
electrical -> chemical