Volumetric pipettes

Calibrating A Volumetric Pipette Ryane Washington Quantitative Analysis Lab INTRODUCTION This experiment was conducted to learn the relationship of 3 different types of pipettes and how to be accurate at measuring volumes of substances very accurately in quantitative analysis lab work. The accuracy of the measurement is the degree of closeness of measurements of a quantity’s actual volumes and the precision is the degree to which that are repeated measurements that are not changed show the

The Objectives for Part B of the experiment are as follows: (1) To determine the mean values and standard deviation for the added volume of (a) Graduated Cylinder (b) Serological Pipet (c) Volumetric Pipet. (2) To determine the accuracy and precision of (a) Graduated Cylinder (b) Serological Pipet (c) Volumetric Pipet by comparing the values of the mean and standard deviation for each volume of 10 mL. (3) To therefore compare such values and further relay the difference in the use of the equipment

To learn how to calculate density and concentration of dilutions. Procedure: I used a ruler, thermometer, and scale to take measurements. I used a graduated cylinder, short step pipet, scale, and ruler to determine volume and density. I used a volumetric flask, graduated pipet, pipet bulb, scale, and glass beaker to determine concentrations and densities of various dilutions. Data Tables: |Data Table 1: Length

The paper reports water and gas flow measurements through carbon nanotubes with diameters of less than 2 nanometers. The measurement of water flow indicated that the values exceeded those predicted by hydrodynamics models by several orders of magnitude. The water flow rates were similar to those predicted from molecular dynamics (MD) simulations. The measurement of gas flow revealed that the predictions given by the Knudsen Diffusion model, commonly employed for systems in which the pore diameter

negligible height change, and steady state, Bernoulli’s equation can be simplified to show the correlation between the volumetric flow rate and the pressure drop. The equation for both meters is as follows: w=Qρ=CYA22gc(p1-p2)ρ1-β4 (1) 1 where A2 is the cross-sectional area of the throat, C is the coefficient of discharge (dimensionless), gc is the dimensional constant, Q is the volumetric rate of discharge measured at upstream pressure and temperature, w is the weight rate of discharge, p1 and p2 are

Calibration of Volumetric Glassware Nur Farah Nabilah Binti Ahmed Zhaini Muhammad Imanuddin Bin Azman Maisarah Binti Alias Summary In this experiment, The purpose of this experiment is to investigate the measurement of the actual volume contents of volumetric glassware. In the beginning of the experiment, the volumetric glassware should be clean and dry before used. The volumetric glassware, measuring cylinder and pipette should be handled with care and all the precautions

choice of equipment and how it affected the accuracy of your method. Discuss good volumetric technique. 2) Calculate the apparatus error for the method used. 3) Given the value calculated by the senior technician calculate your error and comment on this error in relation to the apparatus error of the method. In the titration, I used these available instruments to ensure my results would be as accurate as possible. Volumetric burette: This instrument was filled with the sodium hydroxide solution that would

remove possible smudges on the cuvette so that light could pass through the SpectroVis. The corresponding absorbance at the average maximum wavelengths of Red 40 and Blue 1 were recorded. The solution was disposed of down the sink and the cuvette and pipette were washed with deionized water and dried. If the absorbance values of the Kool-Aid samples did not fall within the range of the absorbance values from Part B, the solutions were diluted using a 2-fold serial dilution. Two serial dilutions were performed

The reason why we got these results can be explained, when alcohol interacts with the cell membrane is affects the normal formation of the lipid chains that form in a bilayer, it is believed that alcohol binds underneath the charged head of the lipid and displaces water that is originally there [1] this breaks up the membrane allowing more of the red pigment to diffuse out of the beetroot. [2] The ethanol forms temporary bonds with the phospholipid heads in the bilayer as they are opposite dipoles

VOLUMETRIC ANALYSIS 1. In volumetric analysis, the volume of a reagent needed to react with analyte is measured. 2. In a titration, increments of the reagent solution -the titrant-are added to the analyte until their reaction is complete. 3. The most common titrations are based on: - acid-base - oxidation-reduction - complex formation and - precipitation reactions 1. Methods of determining when the analyte has been consumed include: - detecting a sudden change in