Acids and Bases.

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Presentation transcript:

Acids and Bases

pH Scale scale used to determine how acidic or basic a liquid solution is Range 0-14 Acids are under 7 7 is Neutral (pure water) Bases are over 7

Compounds that increase the number of hydronium ions (H3O+) when mixed with water pH is under 7 Strong acids can be corrosive (destroy, eat thru) Ex: sulphuric acid Weak acids are sour Ex: lemon juice Turns indicators RED-ish colors Acids

Compounds with an increase of hydroxide ions (OH-) when mixed with water pH is over 7 Strong bases can be corrosive (Drano) weak bases have a bitter taste (salt water) Turns indicators BLUE-ish colors Bases

Neutrals Neither acidic nor basic pH is equal to 7 Ex: pure water

Concentration Refers to how strong the acid or base is Can be reduced by adding water Ex: the more salt you add to water, the higher the concentration (more salty)

Mixing Acids and Bases Acids and bases neutralize each other (cancel each other out) When an acid and a base mix, water and salt form Ex: Base 13 and Acid 1 balance out to 7 (neutral) Mixing Acids and Bases

Plants and animals are sensitive to pH changes in soil and water (biosphere, hydrosphere, lithosphere) Each variety of plant/animal require a specific range of pH for survival To much acid or base could be deadly to plant/animal pH and the Environment

Acids and Bases are produced in the body for proper Digestion Balance of blood pH Muscle repair Lack of balance potentially leads to illness/disease pH and Human Health