Solutions

Views:
 
Category: Education
     
 

Presentation Description

No description available.

Comments

Presentation Transcript

PowerPoint Presentation:

Solutions

Objectives:

Objectives Define solution, solubility, insoluble, solute and solvent Name the universal solvent Distinguish between an aqueous solution and a tincture Identify the factors that affect rates of solubility

Solution:

Solution A mixture that appears to be a single substance but is made up of 2 or more substances that are evenly distributed throughout the mixture

Characteristics:

Characteristics Homogeneous Best mixed of the mixtures Particles are dissolved

Solutions are made up of:

Solutions are made up of Solutes – the substance that is dissolved Solvents – the substance that does the dissolving. It is always present in greater amount.

PowerPoint Presentation:

Solubility – the physical property of being able to dissolve Insoluble – a substance that can not be dissolved

PowerPoint Presentation:

Water is the universal solvent. Most things will dissolve in water. It is called an aqueous solution . Sometimes the solvent is alcohol. In this case it is called a tincture .

PowerPoint Presentation:

Usually solutions are substances dissolved in a liquid but solutions may also be gasses and solids.

Solution rates vary:

Solution rates vary Temperature Surface area Movement Pressure

Temperature:

Temperature The solubility of solid solutes in liquid solvents increases with increasing temperature.

Temperature:

Temperature The opposite is true of gases. Higher temperature drives gases out of solution. Carbonated soft drinks are more “bubbly” if stored in the refrigerator. Warm lakes have less O 2 dissolved in them than cool lakes.

Surface area:

Surface area The larger the surface area of a solid, the faster the rate of dissolving. The surface area of an object increases when it is broken down into smaller pieces.

Movement:

Movement When a substance dissolves, it fills the available spaces between the closest water molecules. Stirring increases the rate the empty spaces can be filled.

Pressure:

Pressure The solubility of liquids and solids does not change with pressure. Increased pressure increases the solubility of gases.

authorStream Live Help