Question

open-ended questions: answer the following questions in complete sentences.

1. explain the difference between a mixture and a compound.
2. describe what happens when you mix oil and water. why does this happen?
3. give an example of a homogeneous mixture and explain why it is considered homogeneous.

Explanation:

1. A mixture is a combination of two or more substances where each retains its own properties. A compound is a substance formed when two or more elements chemically bond together, creating a new substance with different properties. For example, salt water (a mixture of salt and water) vs. water (a compound of hydrogen and oxygen).
2. When oil and water are mixed, they separate into layers. This is because oil is non - polar and water is polar. Polar substances (like water) have a slight charge difference (dipole), and non - polar substances (like oil) do not. “Like dissolves like,” so polar water molecules are more attracted to each other than to non - polar oil molecules.
3. An example of a homogeneous mixture is salt dissolved in water. In a homogeneous mixture, the components are evenly distributed at a molecular level. The salt (solute) is completely dissolved in water (solvent), and the mixture has a uniform composition throughout. You can't see the individual salt particles, and properties like taste and density are the same in any part of the mixture.

Answer:

1. A mixture is a combination of substances with retained individual properties (e.g., salt water). A compound is a new substance from chemically - bonded elements (e.g., water from H and O).
2. Oil and water separate as layers. Water (polar) is more attracted to itself than to non - polar oil.
3. Salt water is a homogeneous mixture. Salt (solute) is evenly dissolved in water (solvent), with uniform composition.