20. Electrochemistry

Given the following standard reduction potentials,

Hg₂²⁺(aq)  +  2 e^–    2 Hg (l)                                                          E° = +0.789 V

Hg₂Cl₂(s)  +  2 e^–    2 Hg (l)  +  2 Cl^-(aq)                                        E° = +0.271 V

determine K_sp for Hg₂Cl₂(s) at 25 °C.

Ni (s)│Ni²⁺ (aq) ║Cu²⁺ (aq)│Cu (s) cell.

For the redox reaction label: the anode, cathode, half-reactions occurring at each half-cell, direction of electron flow, and direction of neutral ions flow.

$Ni\left(s\right)+Zn^{2+}\left(aq\right)\rightarrow Ni^{2+}\left(aq\right)+Zn\left(s\right)$

Most of today's EVs use ____________ batteries.

A positive electrode is called a(n) _____.

What is the reduction half-reaction for the following overall galvanic cell reaction? Co²⁺(aq) + 2 Ag(s) → Co(s) + 2 Ag⁺(aq)