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The image displays a page from a textbook or scientific document detailing the principles and components of a pH meter. The text explains that a pH meter is a sensitive instrument used to measure the pH of solutions, particularly hydrogen ion concentration, and is essential for preparing and quality controlling reagents. It mentions potentiometric analysis and the development of voltage difference across a glass membrane as the basis of pH analysis. The document identifies three basic components of a pH meter: the indicator electrode (glass electrode), the reference electrode (calomel electrode), and the voltmeter. It further describes the indicator electrode as being made of special glass and sensitive to hydrogen ion conductance, while the reference electrode is typically made of Ag/AgCl or calomel. The image also includes a diagram labeled "Fig. 4.1 pH meter," illustrating the setup of the pH meter. The diagram shows a meter connected to two electrodes: a reference electrode and a glass electrode. The reference electrode is depicted containing Ag/AgCl, mercury (Hg), Hg2Cl2, cotton wool, and a KCl solution, with a liquid junction. The glass electrode is shown with KCl crystals. The diagram indicates a voltage difference being measured between these electrodes. The provided image is a close-up of a page of text and a diagram. There is no visual information within the image that suggests a location in Jalingo, Nigeria, or any other city. The content is purely scientific and educational.
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91B5A
Volume
10,820
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