PH meter

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    the water chemistry of a creek enables scientists to ensure the area is relatively pollution free, continues to follow the normal data trends for pH, conductivity, temperature, and nitrate concentration measurements, and…

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    6.03 Ph Lab

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    The purpose of this experiment is to determine the pH of known substances by use of a pH color indicator of red cabbage and the use of a pH meter. As well as, to observe the pH changes in a substance by adding in more basic of acidic to buffered solutions and unbuffered solutions. This experiment will also will show how to calculate H3O+, OH- and pH by use of known values. In order to do this lab, there are a few key components one needs to know and understand first. A solution is a homogeneous…

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    Clock Reaction Lab Report

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    spectrometry and pH measurements. The experiment in Dr. Evans paper will replicated using the same measurements and techniques. This project is to serve as a proof of principle, showing that literature value can be replicated using a weaker magnet. The pH experiment will be used to illustrate the kinetic of the clock reaction. The concentration of the reactants and the pH of reacting mixture will be varied to determine their effect on the induction period of the clock reaction.…

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    Introduction: Within this task we were required to determine the ecological state of the Reddam House wetland, which I presume is at a good standard. I decided to test the ecological status of the wetland by gathering samples from the wetland and testing it for various aspects in the water and the plants that are found within the area. Method: • Collected water in a sterilized bottle at Reddam House wetland as well as observed surrounding fauna and flora. • Took the water to Rand Water to have…

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    Weak Acid Titration

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    of a weak acid can be found experimentally using a pH meter along with the concept of equivalence point when titrating an acid and a base. One half of the weak acid has been titrated at the half-equivalence point, meaning that the concentration of weak acid [HA] and its conjugate base [A—] are equivalent. As seen in the Equation (1), equal values for the concentrations of weak acid [HA] and conjugate base [HA] cancel each other out, mathematically. The…

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    Check the pH of both solutions without any NaOH first. Then begin checking pH after 1 drop, then after 10 drops, and lastly 25 drops. After each set of drops be sure to mix solutions. 4. Compare both sets of pH to determine which had an easier time resisting change. C. Titration curves. 1. Insert NaOH into burette, proceed to clamp burette to stand and insert into beaker containing 10 mL of HCl. 2. Add drops of NaOH into the beaker until a change in pH by 0.50 units is seen or you have added…

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    Nasogastric Tube Placement

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    One advantage of the neck ultrasonography was that it was quick and easier to use that the pH meter. However, ultrasonography will show if the (NG) tube passes through the esophagus but it does not show if the tip is still within the esophagus. The one (NG) tube of the 35 studied was noted to be in the esophagus and not the stomach. Because it passed through the esophagus but the tip remained in the esophagus and not the stomach, this was deemed a false positive. The articles states that the…

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    of an unknown solution. A standard solution is a solution of precisely known concentration. The aim of this experiment was to go over the use of pipettes, burettes, titrations and also to reinforce the concept of molarity. In this experiment, a titration was carried out using a standard solution of hydrochloric acid to establish the molarity of a solution of sodium hydroxide. The concentration of acid in the gastric juice sample was determined using that solution of sodium hydroxide. The pH…

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    That proton, then, becomes a part of the base. This reaction is known as neutralization. When an acid or base are neutralized, its pH level goes to 7 or neutral. On the pH scale, acids range from 1-6 and bases range from 8-14. An example of neutralization is when one mole of HCl and one mole NaOH are mixed to make table salt and water. The pH of water is 7, but salt does not have a pH and does not interact with water molecules.3 Therefore, the pH of the solution is 7, or neutral. To determine…

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    determination of the pH of a buffer solution and the pKa for of a weak acid Introduction A practical was carried out to show how the Henderson-Hasselbalch equation works and to apply and hone the skills of pipetting, buffer-making, pH-meter use and graphing. The primary goal of the practical was to determine the pKa value of a weak acid. The Ka is an acid dissociation constant, it is a quantitative measure of the strength of an acid in solution. The pKa is defined as the negative log of the…

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