Ppt acids and bases

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Information about Ppt acids and bases

Published on September 17, 2014

Author: anujakrishnamma

Source: slideshare.net


Acids & Bases They are everywhere.. In your food In your house EVEN IN YOU!!!!!

What is an acid?  An acid is a solution that has an excess of H+ ions. It comes from the Latin word acidus that means "sharp" or "sour".  The more H + ions, the more acidic the solution.

Properties of an Acid  Tastes Sour  Conduct Electricity  Corrosive, which means they break down certain substances. Many acids can corrode fabric, skin,and paper  Some acids react strongly with metals  Turns blue litmus paper red

What is a base?  A base is a solution that has an excess of OH-ions.  Another word for base is alkali.  Bases are substances that can accept hydrogen ions

Properties of a Base  Feel Slippery  Taste Bitter  Corrosive  Can conduct electricity. (Think alkaline batteries.)  Do not react with metals.  Turns red litmus paper blue.

pH Scale  pH is a measure of how acidic or basic a solution is. • The pH scale ranges from 0 to 14.  Acidic solutions have pH values below 7  A solution with a pH of 0 is very acidic.  A solution with a pH of 7 is neutral. • Pure water has a pH of 7. • Basic solutions have pH values above 7.

Acid – Base Reactions  A reaction between an acid and a base is called neutralization. An acid-base mixture is not as acidic or basic as the individual starting solutions.

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