Experiment 6 - Experiment 6 Buffers and Their Properties CH...

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Experiment 6: Buffers and Their Properties CH 1221 Section 8 Tuesday 2:00 p.m. Charles Dotse October 4, 2016
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Purpose: The objective of this experiment is to understand the qualities of a buffer and to calculate its pH using the Henderson Hasselbach equation. Introduction: The pH value of a solution is the measurement of the amount of [H 3 O + ] ion or the [H + ] ion present. Solutions with a pH value of less than 7 are acids and solutions with a value pH value of greater than 7 are basics. Solutions with a pH value equal to 7 are neutral. A pH meter with two electrodes, one which is sensitive to the [H + ] in the solution, is used. The potential between the two electrodes is calculated, which is correlated to the pH value of the solution. For part A of this experiment, the pH of varying salt solutions will be measured to determine its acidity or basicity. This method is a more reliable way to determine the pH of unknown solutions, rather than using indicators. A buffer is resistant to pH changes, which is why all biological systems rely on buffers to maintain the pH in their blood. Buffers are solutions that contain a weak acid and its conjugate
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