14021091
Description
Flashcards by I Shouldn't be awake, updated more than 1 year ago
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Created by I Shouldn't be awake
over 6 years ago
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| Question | Answer |
| Step 1 | Using a pipette, add measured volume of acid to a conical flask |
| Step 2 | Place the elecrode of a pH meter in the flask |
| Step 3 | Add the aqueous base to the burette and add to the acid in conical flask, 1cm3 at a time |
| Step 4 | After each addition, swirl the contents. Record the pH and the total volume of the aqueous base added. |
| Step 5 | Repeat steps 3 and 4 until the pH starts to change more rapidly. Then add aqueous bsae dropwise for each reading unti the pH changes less rapidly |
| Step 6 | Now add the aqueous base 1cm3 at a time again until an excess has been added and the pH has been basic, with little change, for several additions. |
| Step 7. | Graph of pH against total volume of aqueous base added is plotted |
| Alternative method | Attach pH meter to a datalogger and use a magnetic stirrer in the flask Aqueous base would be added from the burette to the flak slowly and the pH titration curve plotted automatically using the datalogger |
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