Chem Lab Project pre lab.docx

Chem Lab Project pre lab.docx - Kimberly Troncoso Chemistry...

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Kimberly Troncoso Chemistry II Lab Project Concentration of conjugate base by Conductivity 4/4/18 Introduction: The purpose of this experiment is to determine the conductivity of Sodium citrate (citrate is a salt or ester of citric acid). You can use to compare it to the conductivity of the solution assigned. If both solutions have the same conductivity, there is a chance that the formula was plagiarized. If not, the formula was probably not plagiarized. There are many ways to achieve this. One way to do this will be by preparing a couple stock solutions. Then, record the conductivity. Continue to do this until the conductivity reaches between the range 300-6000 microSiemens /cm^-1. After that you create 4 other solutions within the range of 300-6000 microSiemens /cm^-1. The goal is to make a calibration curve for sodium citrate. Using the line of best fit, it will be possible to predict the concentration of the unknown. In order to measure the conductivity, use a multimeter. The multimeter is equipped with a probe. After the probe is placed in the liquid to be measured, the multimeter applies voltage between two electrodes inside the probe. Electrical resistance from the solution causes a drop in the voltage, which is read by the meter. The meter converts
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