Physical Science Ch.8 Semester 2 Exam Review

Explanation
The correct answer is saturated, unsaturated, and supersaturated. These terms are used to describe the concentration of solute in a solution. A saturated solution contains the maximum amount of solute that can dissolve at a given temperature. An unsaturated solution has not reached its maximum solute capacity and can dissolve more solute. A supersaturated solution contains more solute than it should be able to hold at that temperature, often achieved through a process of heating and cooling.

Explanation
This answer is based on the principle that substances with similar chemical properties tend to dissolve in each other. In other words, polar substances dissolve in polar solvents, and nonpolar substances dissolve in nonpolar solvents. This is because the intermolecular forces between the solute and solvent molecules are similar, allowing them to mix and form a homogeneous solution. For example, water (a polar solvent) can dissolve salt (a polar solute) because both have polar molecules. Conversely, oil (a nonpolar solvent) can dissolve grease (a nonpolar solute) because both have nonpolar molecules.

Explanation
When more solute is added to a saturated solution, it becomes super saturated. This means that the solution now contains more solute than it can normally hold at that temperature. The excess solute remains dissolved in the solution, creating an unstable state. Any disturbance, such as temperature change or the introduction of a seed crystal, can cause the excess solute to precipitate out of the solution, returning it to a saturated state.

Explanation
Water is called the universal solvent because it has the ability to dissolve a wide range of substances. This is due to its unique molecular structure, which allows it to form hydrogen bonds with other molecules. These hydrogen bonds break apart the solute molecules and surround them with water molecules, effectively dispersing them throughout the solution. Water's polarity and high dielectric constant also contribute to its solvent properties. As a result, water can dissolve various types of compounds, including polar and ionic substances, making it a versatile solvent in many chemical and biological processes.

Explanation