Voltic Cell

Which direction do the electrons flow in wire X and which metal is oxidized?

• A
• B
• C
• D

Tags

NGSS.HS-PS3-5

Reduction happens at the 

• anode
• cathode
• salt bridge
• voltmeter

Oxidation happens at the

• anode
• cathode
• salt bridge
• voltmeter

Reactions in voltaic cells are

• spontaneous, redox reactions
• non-spontaneous, redox reactions
• spontaneous, non-redox reactions
• non-spontaneous, non-redox reactions

This electrode in a voltaic cell gains mass

• anode
• cathode

What reaction occurs at the anode?

• Ag⁺ + e^- →Ag
• Ag → Ag⁺ + e^-
• Ni²⁺ + 2e^- → Ni
• Ni → Ni²⁺ + 2e^-

Tags

NGSS.HS-PS1-2

• a

• b

• c

• d

Tags

NGSS.HS-PS3-5

In a voltaic cell, electrodes used are copper (electrolyte: copper (II) sulphate solution) and zinc (electrolyte: zinc nitrate solution). What is the half-equation that occur at the copper electrode?

• Cu --> Cu2+ + 2e

• 2H+ + 2e --> H2

• Cu2+ + 2e --> Cu

In a voltaic cell, both the electrodes used are copper (electrolyte: copper (II) sulphate solution). Which of the following observation is correct.

• copper electrode become thinner

• gas bubbles released

• the blue electrolyte turn to pale blue

• the needle of voltmeter does not deflect

The energy change in voltaic cell is ______________.

• kinetic energy --> electrical energy

• electrical energy --> chemical energy

• chemical energy --> electrical energy

• electrical energy --> kinetic energy