AICE Chemistry | Chapter 20.5: Combining Half-Cells

This lecture covers Section 20.5: Combining Half-Cells, from Chapter 20: Electrochemistry. We will explore how to link different half-cells to create a functional electrochemical cell and exactly how to measure standard electrode potentials In this video, we will cover: Constructing an Electrochemical Cell: How to connect two half-cells using a high-resistance voltmeter and a salt bridge (such as filter paper soaked in a saturated solution of potassium nitrate) to complete the circuit and maintain ionic balance. Standard Conditions: Reviewing the strict conditions required when measuring standard electrode potentials: 1.00 mol dm^-3 ion concentration, 298 K (25 C) temperature, and 1 atmosphere of pressure for any gases involved Types of Half-Cells: Moving beyond simple metal/metal ion systems to look at how we construct non-metal/non-metal ion half-cells and ion/ion half-cells. The Role of Platinum: Explaining why an inert platinum electrode (often covered in platinum black) must be used in half-cells that lack a solid metal, allowing the redox equilibrium to be established at its surface without participating in the chemical reaction itself. This video is designed to align with the Cambridge AICE Chemistry (9701) curriculum and is based on the official course textbook and lecture materials. Don't forget to like and subscribe for more AICE Chemistry content! Leave a comment below if you have any questions. #AICEChemistry #ALevelChemistry #Cambridge #Electrochemistry #ElectrochemicalCells #HalfCells #ElectrodePotentials #PendolaChemistry