The above equation describes the reaction between chromium (III) oxide (Cr2O3) and hydrogen gas (H2) to produce chromium (Cr) and water (H2O). This is a reduction reaction, where chromium (III) oxide is reduced to chromium.
- Reaction conditions:
This reaction requires heat to occur, usually at temperatures above 400°C.
- Reaction process:
When chromium (III) oxide and hydrogen gas are introduced into a high-temperature environment, the hydrogen gas reduces chromium (III) oxide to chromium, while also generating water.
- Phenomena that occur:
When the reaction occurs, the main phenomenon is the color change of the reactants. Chromium (III) oxide is dark green, but after the reaction, it turns into silver-gray chromium. Simultaneously, water vapor is formed, which can be seen as steam if the reaction is performed under laboratory conditions.