Why should a magnesium ribbon be cleaned before burning in air?
Properly cleaning a magnesium ribbon before burning it in air is crucial to ensure accurate and consistent results in experiments. Removing any impurities or contaminants on the surface of the ribbon can prevent an incomplete or uneven burn, and can also help to ensure a consistent burn rate. By following a simple cleaning process using a mild solution and a soft-bristled brush, and drying the ribbon thoroughly, you can achieve reliable and accurate results when working with magnesium.