Universal Indicator can be used to find the pH of a solution

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Presentation transcript:

Universal Indicator can be used to find the pH of a solution pH scale Indicators can be used to find out whether a solution is acid, alkaline or neutral Universal Indicator can be used to find the pH of a solution Acid – red, pH less than 7 Neutral – green, pH = 7 Alkali – blue, pH greater than 7 pH scale

pH scale pH scale

pH scale pH scale

pH scale pH scale

Acids react with alkaline solutions to form a salt and water Neutralisation Acids react with alkaline solutions to form a salt and water Hydrochloric acid produces chlorides Nitric acid produces nitrates Sulphuric acid produces sulphates Ammonia can dissolve in water to produce an alkaline solution. This can be neutralised with acids to produce ammonium salts Indicators can monitor neutralisation reactions Neutralisation

Neutralisation – Hydrochloric acid

Neutralisation – Sulphuric acid

Neutralisation – Nitric acid

Neutralisation – Fertiliser

Reaction of Metals and Acid

Metal Oxides & Hydroxides Transition metal oxides and hydroxides do not dissolve in water. They are called bases They react with acids to produce salts that are soluble The excess metal oxide can be filtered off Metal Oxides & Hydroxides

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