126 mL. Erlenmeyer flask. 4- Measure and record the temperature of the room and of the water that was set aside in step 1. The two temperatures should agree before you continue. Read the thermometer to the closest one tenth of a degree‚ using your best estimate. Please be especially careful with the thermometer. 5- Use your pipet to deliver 10.00 mL of the equilibrated water into the Erlenmeyer flask. Note the precision used here. 6- Measure and record the mass of the flask and the water
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solution and then diluted to 750 mL with DI water in Nalgene bottle. Three samples of KHP were weighed on analytical balance model BP2505‚ and placed in 250 mL Erlenmeyer flask. The samples of KHP were warmed up on hot plate to dissolve in Erlenmeyer flasks with 100 mL of DI water added. Two drops of indicator phenolphathalein were added to each flask after KHP completely dissolved. The 50
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Hydroxide These reagents were all used during experiment 4. APPARATUS USED Simple distillation apparatus 250mL round bottomed flask PROCEDURE: Experiment 4 8 mL of cyclohexanol was placed into a 250 mL Erlenmeyer flask‚ and then a thermometer was introduced to the cyclohexanol. A mixture of 4 mL of acetic acid and 115mL of commercial household bleach was slowly added to the flask‚ while swirling it. During adding the mixture‚ the temperature was kept between 40 degrees C-50 degrees C. The process took
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acetic acid would be affected. Water doesn’t affect the Molarity of the concentration of acetic acid because the 1:1 ratio of H+ and OH- ions does not acid the acidity or basicness of the reaction. 5. If a volume of water was added to the Erlenmeyer flask‚ explain how the resultant molarity of acetic acid would be affected. See Number 4 for answer because response is almost identical 6. If methyl orange was used as the indicator‚ explain how the resultant molarity of acetic acid would be
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Materials: -Sodium hydroxide‚ Phenolphthalein solution‚ KHP‚ Pipette‚ 10 ml graduated cylinder‚ large beaker‚ medium beaker‚ 25mL volumetric flask‚ Distilled water‚ stopper‚ 10mL burette‚ ring stand‚ clamp‚ analytical balance scale‚ 25mL Erlenmeyer flask‚ weighing paper. Method: A pipette was used to place 10 drops of 6N NaOH solution into a 25mL volumetric flask. The NaOH was then diluted by adding carbon dioxide-free distilled water to the 25mL mark. A 10mL burette was then put clamped onto a ring
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Windy T. Padilla BIO 008 OP 1-1 Dr. Elmo Ado Laboratory Instruments: Test Tube -A test tube‚ also known as a culture tube or sample tube‚ is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing‚ open at the top‚ usually with a rounded U-shaped bottom. Test Tube Rack - A test tube rack is a gadget used in the laboratory for holding test tubes. It is made of a base that has a platform which is mounted
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potassium iodide. Weigh out approximately 2 g of solid KI. This amount is a large excess over that which is needed. 3. Oxidize the iodide ion with hypochlorite ion. Using a graduated cylinder‚ transfer 25 mL of the dilute bleach into an Erlenmeyer flask. Add the KI and about 25 mL of distilled water. Swirl to dissolve the KI. Working in a fume hood and slowly with swirling‚ add approximately 2 mL of 3 M HCl. The solution should be a dark yellow to redbrown from the presence of I3 - complex
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Lab Report: MEASUREMENT OF VITAMIN C Introduction Nutritional diseases were once the number one cause of death only a century ago‚ but rarely affect our lives today. The complete lack of vitamin C (ascorbic acid) characterized by dark purple spots on the skin and rotting gums‚ a disease called scurvy‚ took the lives of many sailors up until the mid 1800s when the prevention was discovered. Consequently‚ British sailors became referred to as ‘limeys’ because of their daily habit of eating
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Experimental: 2.04 g of KHP‚ 100ml volumetric flask‚ distilled H2O‚ approximately 0.1 M of NaOH‚ Vinegar‚ Phenolphthalein‚ 250ml Erlenmeyer flask‚ weighing balance‚ Graduating Cylinder‚ burette and pH meter were used in our experiment. In our first part of our experiment to prepare a primary standard‚ 0.1 M solution of KHP‚ we carefully weighed out 2.04g of KHP in a weigh paper using the weighing balance and transferred the measured KHP into a 100ml volumetric flask. We rinsed the weigh boat with distilled
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standardize approximately 0.10 M sodium hydroxide solution. To prepare the Potassium Hydrogen phthalate‚ a 2.00 grams of KHP was measured to an accurate measurement of 1.980 grams. A total of 100 mL of water was mixed with the KHP solution in the volumetric flask to finally prepare an acidic KHP solution. The molar mass of KHP was calculated and came to be 208.252 grams per mole. To find the moles of KHP‚ the mass of KHP (1.980 g) was divided by the molar mass of KHP ( 208.252 g) and .00951 moles are in the
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