9.7 & 9.8 Electrochemistry

Oxidation occurs at the...

• anode

• cathode

Reduction occurs at the...

• anode

• cathode

In a Galvanic cell, the electrons flow from the...

• anode to the cathode

• cathode to the anode

In a Galvanic Cell, the salt bridge...

• completes the circuit so that electrons can flow through the wire

• maintains charge balance

• is soaked in an unreactive electrolyte such as KNO₃

• all of the above

Tags

NGSS.HS-PS2-5

In the above Galvanic Cell, which half cell is undergoing reduction?

• Cu | Cu²⁺

• Zn | Zn²⁺

Tags

NGSS.HS-PS1-2

Consider the galvanic cell reaction Zn (s) + Cu²⁺ (aq) → Cu (s) + Zn²⁺ (aq) When the cell is running spontaneously, which is the only true statement?

• The copper electrode loses mass and the zinc electrode is the cathode.

• The copper electrode gains mass and the copper electrode is the cathode.

• The zinc electrode gains mass and the zinc electrode is the anode.

• The zinc electrode loses mass and the zinc electrode is the cathode.

Tags

NGSS.HS-PS1-2

A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg

Which is the half-reaction occurring at the anode?

• HgO + 2 e- → Hg + O^2-

• Zn²⁺ + 2 e- → Zn

• Zn → Zn²⁺ + 2 e-

• ZnO + 2 e- → Zn

ANOTHER NAME FOR A SPONTANEOUS ELECTROCHEMICAL CELL

• SALT BRIDGE

• VOLTMETER

• ELECTROLYSIS CELL

• VOLTAIC CELL

If an electrochemical reaction is spontaneous, what will E_cell be?

• positive

• negative

Calculate the cell potential of voltaic cell

• –1.51
• - 0.03
• +0.03
• +1.51

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1