salt and water can be mixed until the particles of salt have become very small and are no longer visible which property is being demonstrated by this observation

Answer 1

The observation that salt can be mixed with water until the particles of salt become very small and are no longer visible demonstrates the property of solubility. When salt dissolves in water, it dissociates into its constituent ions (sodium and chloride ions) and becomes uniformly distributed throughout the water, creating a solution. This process indicates that the salt is soluble in water, and the resulting mixture demonstrates a homogeneous solution, where the individual particles of salt are no longer visible to the eye.