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pH scale. 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.
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pH scale 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
Neutralisation 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 – Hydrochloric acid Neutralisation
Neutralisation – Sulphuric acid Neutralisation
Neutralisation – Nitric acid Neutralisation
Neutralisation – Fertiliser Neutralisation
Reaction of Metals and Acid Reaction of Metals and Acid
Metal Oxides & Hydroxides 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
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