Lesson 4: Cells and Batteries Flashcards

1
Q

How can we make a cell?

A
  • Two metals in an electrolyte produce a cell.
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2
Q

How do the electrolyte and the metal produce electricity?

A
  • Chemical reaction occurring on two surfaces of metals.
  • Reactions producing electricity.
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3
Q

What do batteries consist of?

A

Batteries consist of two or more cells connected together in series to provide a greater voltage.

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4
Q

What 2 main factors does the voltage of a cell depend on?

A

1.) The type of electrodes
2.) The type of electrolyte.

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5
Q

True or False

Cells can produce electricity for an unlimited period of time.

A
  • False.
  • Only for certain period. Eventually the chemicals in the cell run out and the reaction stops.
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6
Q

How does the type of electrodes used affect the voltage of a cell?

A
  • Greater difference in reactivity between metals produces a higher potential difference .
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7
Q

Why do alkaline batteries run out at some point?

A
  • In non-rechargeable cells and batteries the chemical reactions stop when one of the reactants has been used up.
  • No more electricity is produced
  • Reaction is irreversible.
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8
Q

Why can rechargable cells and batteries be recharged?

A
  • You can reverse chemical reactions when an external current is supplied.
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9
Q

What do cells contain?

SPEC…

A
  • Cells contain chemicals which react to produce electricity.
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10
Q
A
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