Monday, October 14, 2013

Chem

Finding out the concentration of ethanoic acid in 2 brands of vinegar and determine which one is the better buy (plan) utensil and chemicals -2 volumetric flask (250 cm3) -dropper -3 beakers (250 cm3) -filter funnel shape -burette (50 cm3) -pipette (25 cm3) -pipette makeweight -conical flask (250 cm3) -stand and burette clamp -white tile - flexible swoshbottle -distilled body of water -standard atomic number 11 hydrated oxide theme (approximately 0.1 M) -2 brands of colorless moneymaking(prenominal) vinegar in its authorized bottle (approximately 50 cm3 each) -phenolphthalein power Safety precautions Handle acids and radicals with care. In geek any acid or alkali gets into eyes, enunciate to teachers immediately, and squawk the eyes under running water for at least 3 minutes. If any acid or alkali gets onto skin, wash the affected area with plenty of water. Experimental procedure 1. Dilute commercial vinegar brand A 10 propagation as follows: (a) Wash the pipette with water, then with the vinegar A. (b) Using a pipette makeweight and the washed pipette, exile 25.0 cm3 of the vinegar A into a 250.0 cm3 volumetric flask. (c) Pour distilled water from a plastic wash bottle through a filter funnel into the volumetric flask, to a level 2 cm on a set about write up the graduation mark.
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(d) Add distilled water from a dropper until the humble meniscus of the termination just rests on the graduation mark. (e) reproof the stopper in position, invert the flask several times to mix the contents well. 2. (a) Wash the pipette with water, t hen with the dilute vinegar A solution. ! (b) Using a pipette filler and the washed pipette, transfer 25.0 cm3 of the diluted vinegar A solution into a clean conical flask. (c) Add 2 drops of phenolphthalein indicator to the flask. 3. (a) Wash the burette with water, then with the standard sodium hydroxide solution provided. (b) Fill the burette with the sodium hydroxide solution. (c) specify up the apparatus as shown. [pic] (d) Take the initial burette reading (to 2...If you want to get a full essay, furcate it on our website: OrderCustomPaper.com

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