Electrochemical Cell

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

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How do you complete the circuit when using 2 half-cells?

• acid bridge

• base bridge

• salt bridge

If a half-cell does not involve metal atoms or ions, what can you use to complete the circuit?

• Carbon nanotube

• Carbon rod

• Diamonds

Different pairs of metals produce different voltages.

• True

• False

The circuit must be complete for the electrons to flow.

• True

• False

Electrons will flow from the element higher in the Electrochemical Series to the one lower in the Electrochemical Series.

• True

• False

Applications of electrochemical cells is like below except....

• Rechargeable batteries in phones and laptops

• Hydrogen fuel cells in electric cars

• Energy storage systems in the Whitelee Windfarm

• dynamo - electrical generator

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Atoms of which element can most easily be oxidized?

• Copper
• Zinc
• Iron
• Calcium

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In the electrolysis of water, hydrogen gas is produced at the 

• anode 
• cathode

A galvanic cell is established to power a torch, as shown.
For this cell, the overall equation will be

• 2Al(s)+3H_2(g)→2Al³⁺(aq)+6H⁺(aq)
• 3Cl^-(aq)+Al(s)→AlCl₃(aq)
• 2Al³⁺(aq)+3H_2(g)→2Al(s)+6H⁺(aq)
• 2Al(s)+6H⁺(aq)→2Al³⁺(aq)+3H₂(g)

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