CHEM123L Study Guide - Final Guide: Magnetic Stirrer, Purified Water, Ph Meter
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18 Mar 2014
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Experiment procedure summary 4: ph chemistry: acid base titrations and buffers: sign out from storeroom, 1 50 ml pipette bulb, 1 50 ml burette, 1 magnetic stirring bar, 1 25 ml pipette. Make sure that your ph meter has been calibrated. The ph meter should be turned on and the numbers 7 and 4 should be showing. Part a: titrations of a weak acid with strong base. Pipette 25 ml of 0. 1 m acetic acid into a clean 400 ml beaker by placing the magnetic bar first. Copy the exact molarity given on the stock bottle. Add 150 ml deionized water and 2 drops of phenolphthalein. Obtain 60 ml of the unknown naoh solution and prepare for titration. Place it in position to titrate to ch3cooh solution. Record the burette readings and ph, both to two decimals place. Part b: titrations of a weak base with a strong acid. Pipette 25 ml of 0. 1m ammonia into a clean 400 ml.
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