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Reactions of acids (The pH scale and neutralisation (Acids (Acids produce…
Reactions of acids
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Titrations
- Use the pipette to measure 25cm cubed of alkali to a conical flask and add a few drops of indicator.
- Fill the burette with acid and note the starting volume. Slowly add the acid from the burette to the alkali in the conical flask, swirling to mix.
- Stop adding the acid when the end point is reached. Note the final volume reading. Repeat steps 1 to 3 until you get consistent readings.
Titrations are used to work out the precise volumes of acid and alkali solutions that react with each other.
Strong and weak acids
Strong acids
Completely ionised in aqueous solutions e.g. hydrochloric, nitric and sulfric acids
Weak acids
Only partially ionised in aqueous solutions e.g. ethanoic acid, citric acid
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Soluble salts
Soluble salts can be made from reacting acids with solid insoluble substances e.g. metals, metals oxide, hydroxides and carbonates.
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