Volumetric flask

Using a graduated cylinder, 10mL of the 0.05mM Procion red dye stock solution were obtained. Then, using a 5mL volumetric pipet, three 10mL volumetric flasks, and distilled water, the three dilutions were prepared. First, a 5mL volumetric pipet was used to put 5mL of the red dye stock solution into the first 10mL volumetric flask. Next, 5mL of distilled water was added to the first 10mL volumetric flask to create was dilution #1. For the second 10mL volumetric flask, 5mL of dilution #1 and 5mL of distilled water were added to created dilution #2. Lastly, to create dilution #3, 5mL of dilution #2 and 5mL of distilled water were added to the third 10mL volumetric…

density of water over all of the other measuring tools.In this lab, we measured water from pipettes including volumetric and graduated pipettes, graduated cylinders, erlenmeyer flasks, and beakers to figure out the mass and density. These measurements were then used to calculate the percent error. We completed these measurements by measuring the volume of the pipettes in milliliters, the initial mass of the beaker without water in grams, and the final mass of the beaker with water in grams. We…

They added about 20 mL of deionized water to the salt and stirred the solution until it dissolved. As it dissolved, the solution turned into a light blue color. Then to make sure that very little of the solution was left on the stirring rod, they rinsed it with more deionized water into the beaker. After thoroughly rinsing a 50-mL volumetric flask with deionized water, they transferred the solution into this flask and rinsed the 100-mL beaker with deionized water in order to ensure as much of…

The neutralization capabilities of all four were evaluated using back titration. One 100 mL Erlenmeyer flask, four 50 mL Erlenmeyer flasks, and a tablet of commercial antacid were obtained. The antacid tablet tested was Alka-seltzer/Effervescent. First the tablet was crushed and dissolved in 100 mL of 0.15 M HCl solution in the 100 mL Erlenmeyer flask. CO2 (aq) is a common product that can act as a buffer during titration. Therefore CO2 was heated under the hood (which ensured that the…

Methods: To begin, our group acquired three premade vials of .1ml mammal blood with coagulant. We then labeled the vials numbers one, two, and three. In vial number one we added 1 ml of Stock 300 mM NaCl, and no distilled water. This resulted in a NaCl concentration of 1.8 percent. In the second vial we added .5 ml of Stock 300 mM of NaCl, and .5 ml of distilled water. This resulted in a NaCl concentration of .9 percent. In the third vial we did not add any Stock 300 mM of NaCl, and 1 ml…

occurred here. In this case the degrees for before and after were taken when the thermometer rested on a value for a period of time however; it was observed that the thermometer still decreased even after a value rested for a few seconds, when values were recorded in the table the temperature could of possibly keep dropping by a degree of two without knowing. This meant that the temperature recorded differed from the truer value by a full degree causing inaccuracies resulting in a slight change…

however, we did have to calculate the average numerous times. For the first part the lab we had to dissolve the antacid. We had to crush the antacid and add it to a solution. We measured the mass of the flask and got 123.78 grams, in addition to that we also measured the mass of the flask with the antacid to get a mass of 123.95 grams. As we move on to the second part of part A my partner and I prepare HCl solution and record its molar concentration at 0.1 ml. We were also able to figure out…

A graduated cylinder was used to measure 200mL of distilled water into an Erlenmeyer flask and then 40mL of 0.6 M NaOH was added to the distilled water in the flask. The flask was then plugged with a rubber stopper and shook in order to mix the solution. A buret was then washed, rinsed with distilled water, and then 5 mL of the NaOH diluted solution. After the cleansing of the buret, it was then filled up with the NaOH diluted solution. The dilution of the solution was calculated to find the…

In September of 1969, I was five years old, and I started to attend kindergarten. This was the first school year for the newly organized Mid-Valley School District. The new proper name of our school was the Olyphant Elementary School, but we commonly referred to it as the Mid-Valley Elementary School in Olyphant. My classroom was in the part of the building that used to be the Olyphant Central School; the part that was dedicated in 1910. This was the same school building in which my…

Urine and serum samples were transferred to the Chemical Core Analysis Facility of the Occupational and Environmental Health Sciences Institute (EOHSI), Rutgers University. ZEA and its metabolites were measured using an HPLC-MS-MS technique. 0.25 mL sodium acetate buffer (pH=4.65) and 10 μL of β-glucuronidase from Helix pomatia were added into 1mL of urine or serum sample. The enzymatic deconjugation was conducted in a water bath at 37 °C overnight. Then liquid-liquid extraction was performed on…