Chemistry practical 9: monitoring the pH of an acid - base titration 0.0 / 5 ? ChemistryAcids, bases and saltsReactionsA2/A-levelAQA Created by: jamey_brewsterCreated on: 27-04-19 11:40 Why does the pH meter have to be calibrated? pH meters can lose accuracy on storage. 1 of 5 How are pH probes calibrated? Putting a probe in a set buffer and pressing a calibration button to set for that pH. 2 of 5 What variable can be controlled to improve the accuracy of the experiment? Maintaining constant temperature 3 of 5 In a weak acid - strong base titration, what is the flattened part of the graph called? The buffer region (a buffer solution is made as the pH remains almost constant with the addition of small amounts of acid/alkali). 4 of 5 What is the half neutralisation point and what is true when it is reached? The volume of acid/alkali added at halfway between 0 and the volume of acid/alkali that has been added at the equivalence point. 5 of 5
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