Concentrated product: a lot of solute per solvent ex. frozen juices

Large containers of ready made juice are dilute, they have less solute compared to solvent, and thus have high water content

Dilute solutions require more packaging

Examples: instant coffee, soups, salad dressing

These all come in small packages They are all dried The solvent is usually water, but it can be

oil or vinegar

Paper and yard waste make up a large percent of garbage

Packaging is useful, it protects items during transport, prevents spoilage and contamination as well as can be childproof

Acids◦ Corrosive◦ Sour tasting◦ Turns blue litmus paper red◦ React with metals◦ pH less then 7◦ Neutralize bases◦ Conduct electricity

Base◦ Bitter tasting◦ Turns red litmus paper blue◦ Feels slippery◦ Corrosive◦ Neutralize acids◦ Conduct electricity◦ pH greater then 7

Indicator: used to identify acids and bases, are natural substances which change color in the presence of an acid or base

Litmus paper is a common indicator

pH tells you how acidic or basic a substance is

Goes from 1-14 Acids have a pH less then 7 Bases have a pH greater then 7 pH of 7 is neutral

Substances at both ends of the pH scale are corrosive, they can burn skin and other body tissues

Corrosion is the wearing away of materials by chemical action, it is also known as rusting

Oxygen is the primary cause of rusting, but acid rain and salt speed up the process

Acid rain has a pH lower then 5.6, it is created when pollutants from the burning of fossil fuels react with water in the air to form acid rain

Acid rain can corrode metal, stone and plants

Salt from seawater causes corrosion of cars, buildings and ships

Fresh coins are clean and shiny but when they contact air, sweat etc they become dull and discolored