Edda Titrator Essay

Before beginning an experiment, it is good to calibrate any equipment that needs calibration. This ensures that results obtain will be as accurate as possible or as near to the true value. All equipment should be inspected to ensure that there are no chips, cracks or general damage to the equipment as these could cause problems during the experiment which could affect the overall results gained. Equipment such as burettes, pipettes, flasks and beakers must be rinsed with distilled water to get rid of any impurities in the equipment. If solutions are to be poured in any piece of equipment then the equipment should also be rinsed out with the solution being used, this will maintain the pH level in the instrument. Once a solution is transferred from the pipette to the flask, touching the tip of the pipette on the side of the flask will drain any extra drops that may still remain on the tip of the pipette.

To begin, three sets ofabout 0.3000g of KHP are weighed out on an analytical balance. Put the three sets of KHP into three separate, labeled flasks. All three sets of the KHP is then dissolved with approximately 50mL of deionized water. Next, a buret is used to start the actual titration. Buret is initially filled to 0.00mL mark with the NaOH solution, this is recorded as initial volume. Next, add 2-3 drops of phenolphthalein indicator into each of the three flasks containing KHP. A magnetic stir bar is then added to the first flask, and placed above a stir plate. Everything is positioned under the buret. Stirrer is put on medium speed and the titration can start. Slowly release the NaOH into the KHP flask. As the end point is reached, a pink color will be seen in the flask. When the lightest pink possible remains in the solution for more than 30 seconds titration is complete. The final volume is recorded, and the same steps are taken for the other two sets of KHP solution. Finally, blank titration is completed to determine deviation.

The next step in this lab is to rinse the Erlenmeyer flask with distilled water down the drain and then repeat the experiment, this time adding 10 ml of 0.10M KI and 10 ml of distilled water to the flask instead. The flask should again be swirling to allow the solution to succumb to the same temperature as the water bath and once it has reached the same temperature, 10 ml of 3% H2O2 must then be added and a stopper must be immediately placed on the flask and recording should then begin for experiment two. After recording the times, the Erlenmeyer flask must then be rinsed again with distilled water down the drain. After rinsing the flask, the last part of the lab can now be performed. Experiment three is performed the same way, but instead, 20 ml of 0.10 ml M KI and 5 ml of distilled water will be added and after the swirling of the flask, 5 ml of 3% H2O2 will be added. After the times have been recorded, data collection should now be complete.

The content of these tubes was then later transferred to separate small labeled beakers. The initial pH of the water in test tube A was then measured and recorded using a pH meter. Next. One drop and 1 mL of 0.1 M HCl was added to the water in test tube A, and the pH was measured and recorded. The pH meter was rinsed off each time it was used with distilled water and blotted dry. The initial pH of test tube B was then measured and recorded. Using a graduated cylinder and a pipette, 1 mL of 0.1 M HCl was added to the buffer in test tube B, and the pH was measured and recorded. Then, an additional 2 mL of 0.1 M HCl was added to test tube B, and the pH was measured and recorded again. After adding those 2 mL, three more millimeters of 0.1 M HCl

18. Dip approximately 10 mm of a toothpick into the distilled water. Then, while toothpick is still damp, dip the toothpick into the EBT indicator powder.

Use a dropper to remove water from the beaker and drop 10 drops onto a spotting plate. Use the BTB to determine whether the water is acidic or basic and record your findings

The procedure starts by obtaining 25 mL of HC₂H₃O₂ that has an unknown concentration. Take 10 mL of the HC₂H₃O₂ and add it to a 250 mL beaker that already contains 50 mL of distilled water. Next, set up the lab quest and fill a 50 mL buret with 0.100 M NaOH. Place the pH sensor into the solution prepared earlier and start data collection. Record the original pH when no NaOH is added, and continue to record the pH and amount of NaOH after every addition. Add NaOH in increments to change the pH by 0.15 pH units. Once a pH of 5 is reached, add NaOH drop by drop until a pH of 10 is reached. One desired ph of 10 is reached, add increments to raise pH by 0.15 pH units until the pH remains constant. Lastly, stop the data collection and examine the

This experiment is being done to show the effect oh pH levels on daphnia by changing pH levels and measuring the hear rate.

The tube containing an Elodea densa plant, 25% red dye, and 3.75mL of a sodium bicarbonate solution resulted in an average pH level of 8.17. The tube containing no Elodea densa plant, 25% red dye, and 3.75mL of a sodium bicarbonate resulted

Fill the buret with the NaOH solution above the 0.00 mL mark. Place a beaker under the tip and allow the NaOH solution to flow out until the volume is just below the 0.00 mL mark. Make sure the buret does not leak. If a leak occurs, inform your TA. Record the initial volume of the buret to two places to the right of the decimal. Replace the waste beaker with the Erlenmeyer flask containing solution of acidic soda. Make sure to refill the buret between 0.00 mL-2.00 mL of NaOH after each titration trial.

The first experiment begun by filling a 600-ml beaker, almost to the top, with water. Next, a 10-ml graduated cylinder was filled to the top with water. Once water was added to the beaker and graduated cylinder, a thumb was placed over the top of the graduated cylinder. This would ensure that no water was let out and no bubbles were let into the graduated cylinder. Next, it was turned upside down and fully submerged into the beaker. Then, a U-shaped glass tube was attained. The short end of the glass tube was placed into the beaker with the tip inside of the graduated cylinder. Next, a 50-ml Erlenmeyer flask was received. After, 10-ml of substrate concentration and 10-ml of catalase/buffer solution were placed into the flask. A rubber stopper was then placed on the opening of the flask. After adding these, the flask was held at the neck and spun softly

When taking trips down to Pistol Creek and taking many measurements, but focusing on the pH level which affects water quality according to the research done by Harvard. The lab procedures are done in a very strict manner when using the pH meter which detects the pH levels of the water, and must be done in a certain way. First, the electrode should be immersed. Thus between pH measurements it should be put into a baker with distilled water. Before every single pH measurement, or before any serie of uses, you must calibrate After calibration you are ready to measure pH. Rinse electrode and submerge it in the tested solution. Read the result and write it down in your lab notebook. Rinse the electrode and move it to the storage

Titration Investigation Aim: The aim of my investigation is to determine the solubility of calcium Hydroxide solution with the aid of the titration process. Titration can be defined as the method of determining the concentration of a substance in solution by adding to it a standard reagent of known concentration in carefully measured amounts until a reaction of definite and known proportion is completed, as shown by a color change or by electrical measurement, and then calculating the unknown concentration. An example could be, a given volume of a solution of unknown acidity may be titrated with a base of known concentration until complete neutralization has occurred.

Then, the test tubes were placed in the test tube rack. A plastic dropper was used to measure the number of drops that were deposited in every test tube. To test for temperature and for pH levels, in the number one test tube, twenty drops of Hydrochloric Acid (HCL) were added. For the number two test tube, twenty drops of water (H2O) were added. For the number three test tube, twenty drops of sodium hydroxide (NaOH) were added.

To perform module 11 analysis, we followed Lab safety procedure by wearing safety goggles (Z87 brand), plastic apron, and a pair of latex gloves as proper “PPE”. We proceeded to module 11 analysis by drawing a sample solution from Lab sink Tap into a (250 ml) plastic sample container and closing the lid. We went on preparing the Oakton PCS tester 35 series meter for measurement by rinsing it with DI water. The meter was set for pH (USA) unit. Followed by calibrating with a pH buffer standard solution (4.0. 7.0, 10.0) for three point calibration. The meter was rinsed with DI water. As we proceeded, the meter was calibrated with a conductivity buffer standard solution (1412±14 µS) by following the manufacturer 's instruction. Then, the meter