P200 Pipete Lab Report

Use a glass beaker to pour an adequate amount of the liquid substance and use the pipette from the glass beaker.

The measuring cylinder was then used to accurately measure out 20 mL of water, which was then poured into the test tube that would be used for the experiment. The test tube was then placed into the clamp, which was then adjusted in order to make sure that the test tube was grasped firmly and would not fall out.

Thereafter I used a pipette to meticulously drop in water up to the 250ml mark.

In this lab the density of a glass marble was measured. Since the formula for density is mass divided by volume, the the mass of the glass marble alone was measured using an electronic balance. Afterwards, the volume of the marble was measured using the displacement water method. 20 mL of water was added to a 25 mL graduated cylinder and the amount added with correct precision and uncertainty was recorded. Once that step was complete, the graduated cylinder with 20 mL of water was slightly tilted so that the glass marble could be placed inside. The new volume was then recorded with correct precision and uncertainty. Then, the original volume was subtracted from the final volume to calculate the volume of the glass marble with the correct amount

1. Fill the graduated cylinder nearly to the top with water, with a tall glass tube open at both ends (the water level with act as the closed end).

First, I will get my materials and set up the scale and 10 mL cylinder and refraction cell. I will check the size of the graduated cylinder to find out the volume. (LxHxW) That will equal 40.5mL for volume. I will see how much the cell weighs alone, and then I will 0 out the scale to see how much the water weighs. Then I will see how much the water and the cell weigh together. I will do this for the cell and cylinder. I will check to see if the density I calculated is what it is supposed to be at 1.00.

1. Move the lid of the container up or down. Record the resulting volume and pressure

Introduction: Accuracy and precision were the major aspects of the lab. Accuracy is how close the average of the measured values are to the actual value. Precision is the closeness of repeated measurements. In the lab, the aim was to get as close as possible with both accuracy and precision when determining the mass and volume of the spheres. The mass was determined by weighing the spheres on the Analytical Scale and Triple Beam Balance Scale. The volume is determined by measuring with a ruler and by water displacement. The standard

1. Gathered all required materials to designated lab bench. 2. Considered all safety precautions including the prevention of spilling water to avoid falls, handling glassware carefully to prevent shattering, avoiding long periods of working with warm water to avoid burns and avoiding the digestion/inhalation of by-products produced after the reaction (e.g. ethanol and carbon dioxide gas). 3.

The mass of the aluminum cylinder was 17.1420 g. The volume of the aluminum cylinder, by calculation was 6.33 cm^3. Based on water displacement, the volume was 16.5 ml. The density by calculation of the aluminum was 2.71 g/cm^3. Based on water displacement, the density was 1.04 g/ml.

The pipette was used to transfer 8 mL of the 0.5 molarity solution into the graduated cylinder. Distilled water was added to raise the bottom of the meniscus to the 20.0 mL line and the solution was transferred into the beaker after it was rinsed with the solution. The pipette was used to take a small quantity of the solution and rinse and then fill a test tube with the solution. The amount of 0.2 molarity solution needed to create 20.0 mL of 0.1 molarity solution was calculated as 10.0 mL. The pipette was used to transfer 10.0 mL of 0.2 molarity solution into the graduated cylinder and distilled water added until the bottom of the meniscus reached the 20.0 mL line. The solution was transferred to the rinsed beaker and then a portion placed into a test tube that had been rinsed with the solution. The amount of 0.1 molarity solution required to create 20.0 mL of 0.05 molarity solution was calculated to be 10.0 mL. The pipette was used to transfer 10.0 mL of 0.2 molarity solution into the graduated cylinder and distilled water added until the bottom of the meniscus reached the 20.0 mL line. The solution was then placed into a beaker that had been rinsed with the solution and then into a rinsed test

Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.

Determine the volumes of the objects, including the aluminum cubes, using the water displacement method. Measure out 20 mL of water into the graduated cylinder (measure out 40 mL when measuring the volume of the corks), place the objects (when measuring the volume of the rock only use one rock) into the cylinder and measure the new volume in mL according to how much the water rose. When measuring the volume of the corks, remember to use the marbles to keep the corks in place and then subtract the volume of the marbles from the combined volume. Subtract 20 mL from the measured amount. Subtract 40 mL when calculating the volume of the corks. Record

a) Transfer pipette was obtained. The pipette was cleaned because distilled water does not drain uniformly. A cleaning solution or detergent was used to clean the pipette.

To begin this experiment, 80.0mL of distilled water was measured using a graduated cylinder and promptly poured into a 100mL beaker. Next, a small grape was dropped into the beaker and automatically sunk to the