Mixtures

Question of the Day Explain in your own words (draw if needed), what is the definition of a mixture?

Mixture A mixture is a substance made up of two or more substances which are physically combined. A mixture can be heterogeneous or homogeneous Examples:

Heterogeneous Mixture A heterogeneous mixture is a mixture where we can distinguish (see or identify) the different parts that make up the total mixture Substance A Substance B Heterogeneous Mixture Add and mix together

Examples of Heterogeneous Mixtures

Homogeneous Mixture (Solutions) A homogeneous mixture is a mixture where we cannot distinguish (see or identify) the different parts that make up the total mixture. A homogenous mixture is also called a solution. Add and mix together Substance A Substance C Homogeneous Mixture

Examples of Homogenous Mixtures

Heterogeneous and Homogenous Mixtures Sometimes, when you add two different substances, they can be a heterogeneous mixture at first, but it can become a homogeneous mixture after. Example: Sugar in water: _______________________________

Preparing Mixtures When two liquids are mixed together, a homogenous or heterogeneous mixture can happen. If both liquids combine and we can only see one liquid, the liquids are called miscible If both liquids do not combine and we can still see both liquids, they are called immiscible

Example of Miscible

Example of immiscible

Review: Physical and Chemical Changes A physical change changes the physical state of a substance. The nature of the substance does not change. This is reversible. Example: melting or freezing water A chemical change is a radical change that chances the nature of the substance and gives it new properties. Chemical changes are usually not reversible. Example: bread warming into toast