Which characteristic is true about magnesium sulfate?

Magnesium sulfate is indeed characterized as being colorless and odorless. This property is significant because it indicates that the substance does not emit any distinct color or smell, making it less likely to cause sensory irritation or distraction in experimental settings. Magnesium sulfate occurs in both anhydrous and hydrated forms; its hydrate, commonly known as Epsom salt, is often encountered in everyday life and is recognized for its typical appearance as white crystalline granules. Its colorless and odorless characteristics help in its identification and use in various applications, including medicine, agriculture, and chemistry.

The other characteristics may not accurately represent magnesium sulfate's properties. For instance, while it does have a specific melting point, it is not characterized by a low melting point. Instead, it has a melting point of around 1124 degrees Celsius for the anhydrous form. As for physical state, magnesium sulfate as Epsom salt is solid at room temperature, but it’s important to note that there are forms that differ in appearance and physical state. Lastly, the molar mass is approximately 120.37 g/mol, which indicates some confusion in measuring, making it important to refer to accurate scientific data when discussing compounds.