Save guides, add subjects and pick up where you left off with your BBC account. \(Mg(s) + O_2^{}(g) \to MgO(s)\) The metal atoms are losing electrons to form an ion. They are being oxidised.

Photocatalysis—a chemical reaction driven by light in the presence of a photocatalyst—is poised to play a key role in next-generation technologies, including hydrogen production through water ...

Carboxylic acids can undergo reduction reactions. Reduction is the opposite of oxidation. For example, ethanoic acid (CH 3 COOH) can be formed by the oxidation of ethanol as shown below.

Combustion is a type of chemical reaction called a redox reaction, short for ‘reduction-oxidation’. Here, one substance loses electrons and the other gains them. The losing substance is called ...

Oxygen reduction is a central reaction in fuel cells ... possibly due to self-oxidation. In contrast, the cube-shaped crystals—though less reactive—were more robust over time.