Final answer:
The term used to describe how well a substance can mix with water is 'solubility,' which is a measure of a substance's ability to dissolve in water at specific temperature and pressure conditions. so, option A is the correct answer.
Step-by-step explanation:
The term used to describe the extent to which a substance will mix with water is solubility. Solubility is a measure of how much of a solid substance remains dissolved in a given amount of a specified liquid at a specified temperature and pressure. A substance with high solubility will dissolve in water to a significant extent, whereas substances with low solubility will be less likely to dissolve and may precipitate out of the solution. 'Like dissolves like' is a helpful rule of thumb for predicting solubility; substances with similar intermolecular forces tend to be more soluble in each other.
When a substance's concentration exceeds its solubility in a solution, it will precipitate, forming a solid. Solubility varies for different substances and can be affected by factors such as temperature and the presence of other chemicals in the solution. Solubility is also an important concept in understanding electrolytes, which are substances that dissolve in water to yield ions and can be either strong or weak electrolytes based on their solubility and dissociation in water.