Characteristics and Functions of Solutions

This lesson covers the concept of solutions, emphasizing that they are homogeneous mixtures where substances are evenly distributed in a single phase. Examples like salt water are used to illustrate solutions, contrasting with non-solutions like sand in water. Key components of solutions, the solvent and solute, are defined, with water often serving as the solvent. The lesson concludes with a brief overview of the next topic, calculations involving solutions.

What is a key characteristic of a solution?

• It is a heterogeneous mixture.

• It is a homogeneous mixture.

• It consists of multiple phases.

• It is always a solid.

Why is sand in water not considered a solution?

• Because water is not a solvent.

• Because sand remains visible and separate.

• Because it forms a single phase.

• Because sand dissolves completely.

What happens when salt is dissolved in water?

• The water evaporates.

• The salt forms a separate layer.

• The salt becomes part of a single phase.

• The salt remains visible.

In a solution, what is the role of the solvent?

• It is always a gas.

• It is the substance that dissolves the solute.

• It is the substance being dissolved.

• It is always a solid.

Which of the following is an example of a solute in a saltwater solution?

• Sand

• Salt

• Air

• Water

What is the main function of a solvent in a solution?

• To form a separate layer.

• To remain undissolved.

• To dissolve the solute.

• To evaporate quickly.

In a sugar water solution, what is the solute?

• Water

• Sugar

• Sand

• Salt

Which statement is true about solutions?

• They are always visible.

• They consist of multiple phases.

• They cannot contain gases.

• They are homogeneous mixtures.

What distinguishes a solution from a simple mixture?

• Solutions are heterogeneous.

• Solutions are visible.

• Solutions are always solid.

• Solutions form a single phase.

Which of the following is not a characteristic of a solvent?

• It dissolves the solute.

• It forms a separate phase.

• It is always a liquid.

• It is the main component of a solution.