Types of Mixtures Solutions Solutions are homogeneous mixtures

Solutions • Solutions are homogeneous mixtures made up of two components. • The part

Solutions (continued) The solute particles are < 1 nm in diameter. How large are

Colloids • Colloids are heterogeneous mixtures. • The particles mixed into the main component

Tyndall Effect • Particles in a colloid are large enough that they will reflect

Suspensions • Suspensions are also heterogeneous mixtures. • The particles in a suspension are

Suspensions • The larger particle size allows for suspensions to be separated by filtration.

Solution, Colloid, or Suspension • Recently opened soft drink • Fog • Food coloring

Slides: 13

Download presentation

Types of Mixtures

Solutions • Solutions are homogeneous mixtures made up of two components. • The part of the solution that does the dissolving is called the solvent. • The part of the solution that gets dissolved is called the solute. • In a sugar water solution, what is the solute? • Sugar • In a sugar water solution, what is the solvent? • Water

Solutions (continued) The solute particles are < 1 nm in diameter. How large are these particles in cm? 0. 0000001 cm As a result, solutions often appear clear. Due to the extremely small particle size solutions remain mixed and do not separate (settle out) upon standing. • Solutions cannot be separated by filtration (particles are so small they pass through the paper with the solvent. • Examples include: kool-aid, flat soft drink • • •

Solutions

Colloids • Colloids are heterogeneous mixtures. • The particles mixed into the main component are between 1 and 100 nm in diameter. • Due to the slightly larger particle size, colloids appear cloudy. • Although the particles are larger than in a solution, they are still small enough that they stay mixed and do not separate upon standing and cannot be separated by filtration. • Examples: milk, whipped cream

Colloids

Tyndall Effect • Particles in a colloid are large enough that they will reflect (scatter) light. • This phenomenon is referred to as the Tyndall Effect.

Tyndall Effect

Suspensions • Suspensions are also heterogeneous mixtures. • The particles in a suspension are the largest and have a diameter > 100 nm. • Due to the larger size these particles will separate (settle out) upon standing. • If all of the particles have separated, the liquid may appear clear. If not, the liquid may appear cloudy.

Suspensions • The larger particle size allows for suspensions to be separated by filtration. • The Tyndall effect may be observed if the particles have not settled out. • Examples: muddy water, Italian salad dressing.

Suspension

Solution, Colloid, or Suspension • Recently opened soft drink • Fog • Food coloring in water • Blood • Milk • Pure air • Sugar water • Paint