MYP Chemistry Topic 5.15 Electrochemical Cell…

According to the principles of chemical equilibrium and cell potential, how would decreasing the concentration of the reactant ions in the cathode half-cell affect the measured voltage?

True or False: Lithium-ion batteries are widely used in portable electronics primarily because they offer high energy density, allowing for a large amount of stored energy relative to their mass.

What is the expected observation regarding the concentration of $\text{Cu}^{2+}(\text{aq})$ ions in the cathode half-cell during the operation of a magnesium-copper cell?

Calculate the standard cell potential ( $E^{\circ}_{\text{cell}}$ ) for a voltaic cell constructed from lithium and copper half-cells using the following standard reduction potentials:

E^{\circ}(\text{Li}^{+}/\text{Li}) = -3.04\text{ V}

E^{\circ}(\text{Cu}^{2+}/\text{Cu}) = +0.34\text{ V}

Which of the following is a major environmental concern specifically associated with the disposal of older secondary cells like Nickel-Cadmium (NiCd) batteries?

The voltage would decrease

The voltage would drop to zero immediately

The voltage would increase

The voltage would remain exactly at $E^\circ_{\text{cell}}$

The concentration decreases as copper ions are reduced to solid copper

The concentration remains constant as the salt bridge prevents ion loss

The concentration increases as copper is oxidised at the cathode

The concentration increases due to the migration of cations from the salt bridge

MYP Chemistry 5.15 Electrochemical Cell Questionbank

MYP Chemistry 5.15 Electrochemical Cell Questionbank

MYP Chemistry 5.15 Electrochemical Cell Questionbank

MYP Chemistry 5.15 Electrochemical Cell Questionbank

MYP MYP Chemistry Topic 5.15 Electrochemical Cell Questionbank