core chemistry acids

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THE pH SCALE
-ACIDS have pH lower than 7 and turn universal indicator paper red or orange -bases neutralise acids to make a salt and water -bases that are soluble in water are called ALKALIS and form ALKALINE solutions with a pH of more than 7
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THE pH SCALE
-ALKALIS turn universal indicator paper blue or purple -neutral solutions have a pH of 7 and turn universal indicator green
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WHAT DOES pH SCALE mean
A measure of hydrogen ion concentration
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what does ACID mean?
substance producing more hydrogen ions than hydroxide ions when dissolved in water
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what does ALKALI mean?
substance producing more hydroxide ions than hydrogen ions when dissolved in water
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what does NEUTRALISATION mean?
the reaction between an acid and a base to form a salt plus water.
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what does SALT mean?
a compound formed by neutralisation of an acid by a base,EG a metal oxide, as the result of hydrogen atoms in the acid being replaced by metal atoms or positive ions. sodium chloride, common salt,is one such compound.
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Card 2

Front

-ALKALIS turn universal indicator paper blue or purple -neutral solutions have a pH of 7 and turn universal indicator green

Back

THE pH SCALE

Card 3

Front

A measure of hydrogen ion concentration

Back

Preview of the back of card 3

Card 4

Front

substance producing more hydrogen ions than hydroxide ions when dissolved in water

Back

Preview of the back of card 4

Card 5

Front

substance producing more hydroxide ions than hydrogen ions when dissolved in water

Back

Preview of the back of card 5
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