Electrochemical Cell Concepts

The video tutorial explains the setup and measurement of electromotive force (EMF) in electrochemical cells using zinc and copper half cells. It covers the concept of equilibrium in half cells, the significance of E-standard values, and the process of measuring EMF with a voltmeter and salt bridge. The tutorial also discusses experimental results and potential complications when dealing with different solutions or gases.

What is the concentration of Zn2+ ions in the zinc sulfate solution used in the experiment?

• 1.5 moles per decimeter cubed

• 0.5 moles per decimeter cubed

• 1.0 moles per decimeter cubed

• 2.0 moles per decimeter cubed

What type of equilibrium is established in the beaker with zinc metal?

• Dynamic equilibrium

• Chemical equilibrium

• Thermal equilibrium

• Static equilibrium

What is the concentration of Cu2+ ions in the copper sulfate solution used in the experiment?

• 0.5 moles per decimeter cubed

• 2.0 moles per decimeter cubed

• 1.0 moles per decimeter cubed

• 1.5 moles per decimeter cubed

What is the standard electrode potential of the zinc half cell?

• -0.34 volts

• 0.00 volts

• 0.76 volts

• -0.76 volts

What is the standard electrode potential of the copper half cell?

• -0.76 volts

• -0.34 volts

• 0.76 volts

• 0.34 volts

What is the purpose of the high resistance voltmeter in the circuit?

• To allow electrons to flow

• To decrease the voltage

• To stop the current from flowing

• To increase the current flow

What is the role of the salt bridge in the electrochemical cell setup?

• To allow electrons to flow

• To prevent ions from moving

• To allow ions to flow

• To increase the voltage

What was the measured potential difference in the experiment?

• 1.00 volts

• 1.09 volts

• 1.10 volts

• 1.20 volts

What is the expected potential difference based on the standard electrode potentials?

• 1.09 volts

• 1.00 volts

• 1.20 volts

• 1.10 volts

What might be needed if different solutions or gases are used in the experiment?

• A silver electrode

• A copper electrode

• A platinum electrode

• A zinc electrode