Acids+and+bases

=ACIDS AND BASES=

Scientists use something called the **pH scale** to measure how acidic or basic a liquid is. We in class sometimes also use the term alkali for base. The scale goes from values 0 through to 14. Distilled water is 7 (right in the middle) 7 is neutral Acids are found between a number very close to 0 and 7. Bases are from 7 to 14. Most of the liquids you find every day have a pH near 7.

=NAMES TO KNOW=

Here are a couple of definitions you should know:


 * Acid:** A solution that has an excess of H+ ions. It comes from the Latin word acidus that means "sharp" or "sour".
 * Base:** A solution that has an excess of OH- ions. Another word for base is alkali.
 * Neutral** is 7
 * Acid** is 1- 7
 * Base/Alkali** is 7-14

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Here is a table we did in class to show what Acid, base and neutral was in different Indicators:


 * = Indicator ||= Acid ||= Alkali ||= Neutral ||
 * = Universal Indicator ||= Red ||= Blue ||= Green ||
 * = Blue Litimus ||= Red ||= Blue ||= Blue ||
 * = Red Litimus ||= Red ||= Blue ||= Red ||