Electrochemistry Regents practice

When comparing voltaic cells to electrolytic cells, oxidation occurs at the

• anode in both types of cells

• cathode in both types of cells

• anode in voltaic cells, only

• cathode in voltaic cells, only

Which form of energy is converted to electrical energy in a voltaic cell?

• chemical

• mechanical

• nuclear

• thermal

Which statement is true for any electrochemical cell?

• Oxidation occurs at the anode, only.

• Reduction occurs at the anode, only.

• Oxidation occurs at both the anode and the cathode.

• Reduction occurs at both the anode and the cathode.

Which change occurs at the anode in an operating electrochemical cell?

• gain of protons

• gain of electrons

• loss of protons

• loss of electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

When a voltaic cell operates, ions move through the

• anode

• cathode

• salt bridge

• external circuit

Which statement describes the reactions in an electrochemical cell?

• Oxidation occurs at the anode, and reduction occurs at the cathode.

• Oxidation occurs at the cathode, and reduction occurs at the anode.

• Oxidation and reduction both occur at the cathode.

• Oxidation and reduction both occur at the anode.

Which device requires electrical energy to produce a chemical change?

• electrolytic cell

• salt bridge

• voltaic cell

• voltmeter

Tags

NGSS.HS-PS3-1

An electrolytic cell differs from a voltaic cell because an electrolytic cell

• generates its own energy from a spontaneous physical reaction

• generates its own energy from a nonspontaneous physical reaction

• requires an outside energy source for a spontaneous chemical reaction to occur

• requires an outside energy source for a nonspontaneous chemical reaction to occur

Tags

NGSS.HS-PS1-4

Given the balanced ionic equation representing a reaction:

2Al(s) + 3Cu⁺²--> 2Al⁺³+ 3Cu(s)

Which half-reaction represents the reduction that occurs?

• Al--> Al⁺³+3e

• Al⁺³+3e --> Al

• Cu--> Cu⁺²+2e

• Cu⁺²+ 2e --> Cu

Which half-reaction equation represents reduction?

• Cu--> Cu⁺²+2e

• Cu⁺²+2e --> Cu

• Ag +. e --> Ag⁺

• Ag⁺--> Ag + e

Tags

NGSS.HS-PS1-2