Chemistry
Published on Nov 26, 2015
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PRESENTATION OUTLINE
Bases
Bases - Substances that can react with acids and neutralize them to make a salt and water
Bases that dissolve in water are called alkalies.
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Alkalies
-Bases that dissolve in water are called alkalies.
-Alkaline solutions has a pH of more than 7
-The stronger the alkali, the higher the pH number.
-Alkalies turn red litmus paper blue.
-They turn universal indicator dark blue or purple if they are strong, and blue-green if they are weak.
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Neutral solutions
-Neutral solutions have a pH of 7.
-They do not change the colour of litmus paper, but they turn universal indicator green.
-Water is neutral.
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