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 pH: a mathematical measure of hydrogen ions and hydroxide groups in a solution.

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Presentation on theme: " pH: a mathematical measure of hydrogen ions and hydroxide groups in a solution."— Presentation transcript:

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2  pH: a mathematical measure of hydrogen ions and hydroxide groups in a solution

3  A solution is “acidic” if the pH is less than 7  A solution is “basic” if the pH is more than 7

4  pH scale- measures how acidic, basic, or neutral a substance is  Ranges from 0-14  pH of 7= neutral  pH of less than 7= acidic  pH of more than 7= basic

5 Basic

6  Pure distilled water is neutral (pH=7)  When chemicals are mixed with water, the mixture can be acidic or basic  The pH of a sample of water determines its quality

7  Contain Hydrogen Ions H +  Always willing to give a Hydrogen ion  Characteristics of Acids:  Sour taste  Conduct Electricity  Red on pH paper  Burn skin

8  Contain OH - groups / Hydroxides  Always willing to accept a hydrogen ion  Characteristics  Slippery Feeling  Conduct Electricity  Blue on pH paper  Burn skin

9  When an acid and a base react, this is called a neutralization.  The acid and the base balance each other out and move towards neutral (think average).  The byproduct of neutralization is always water and any type of salt.  H + + OH - H 2 0

10  Examples:  Strong Acid + Weak Base = Water and Acidic Salt  Weak Acid + Strong Base = Water and Basic Salt  Strong Acid + Strong Base = Water and Neutral Salt

11 1) Ammonia 2) Milk 3) Vinegar 4) Lemon juice 5) Milk of Magnesia 6) Hydrochloric Acid 7) Rubbing Alcohol 8) Bleach 9) Tap Water

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