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Obtaining pH curves for acid/alkali titrations.
Member rating: No Rating | Words: | Submitted: Mon Jun 19 2006
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Obtaining pH curves for acid/alkali titrations Obtaining pH curves for acid/alkali titrations Planning In order to obtain a pH curve, I must first devise a way in which to measure both the pH and the volume of alkali being added to the weak acid in order to draw a graph from my results and then from this graph find Ka. Method I will set up the equipment as shown in the diagram below: I will use a pipette and pipette filer to take 25cm3 exactly of the weak acid (0.1M ethanoic acid, CH3COOH) and place it in a beaker. I will then take a burette and place in it 50cm3 of 0.1M sodium hydroxide (NaOH). I will then measure the exact amount of NaOH added to the acid whilst using an accurate pH meter rather than indicator to measure the change in pH. Before using the pH meter, I will first dip it into two buffer...
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