Unfortunately, there is currently no known chemical substance under the name Mg2SO5. You might have been mistaken, as there is no substance with that molecular formula. Therefore, detailed information about its chemical properties, physical properties or related chemical equations cannot be provided.
However, you may be looking for information about MgSO4, also known as Epsom salt, an important chemical compound. MgSO4 is a magnesium salt of sulfuric acid, appearing as colorless, odorless crystals with a salty taste. Its chemical properties mainly relate to its solubility in water and reactions with other substances to form more complex compounds. MgSO4 is commonly used in medicine, agriculture, and as a water softening agent.
If you need information about a specific chemical substance, please provide the exact name or molecular formula of that substance.