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Tag Archives: precipitate
Vacuum Filtration
Illustration showing the equipment for filtering a precipitate through a filtering crucible. Suction from a vacuum, often from a water aspirator, pulls the solution through the filtering crucible leaving the precipitate behind. The trap prevents water from an aspirator from … Continue reading
Posted in Illustration
Tagged filtration, gravimetry, precipitate, vacuum filtration
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Gravity Filtration
Illustration showing how to prepare a filter paper cone for gravity filtration. The filter paper circle in (a) is folded in half (b), and folded in half again (c). The folded filter paper is parted (d) and a small corner … Continue reading
Posted in Illustration
Tagged filtration, gravimetry, gravity filtration, precipitate
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Coagulation of a Precipitate
Two methods for coagulating a precipitate of AgCl are illustrated here: (a) because of electrostatic repulsion, coagulation will not take place if both particles are positively charged; (b) decreasing the charge within the primary adsorption layer, by adding additional NaCl, … Continue reading
Inclusions in Precipitates of Potassium Perchlorate
Mixing solutions of 1.5 M KNO3 and 1.5 M HClO4 produces a white precipitate of KClO4. If permanganate ions, MnO4–, are present, an inclusion of KMnO4 is possible. Impure precipitates of KClO4 are purple if an inclusion of KMnO4 is … Continue reading
Inclusions, Occlusions, and Surface Adsorbates
Three examples of impurities that may form during precipitation. The cubic frame represents the precipitate and the blue marks are impurities: (a) inclusions, (b) occlusions, and (c) surface adsorbates. Inclusions are randomly distributed throughout the precipitate. Occlusions are localized within … Continue reading
Posted in Illustration
Tagged gravimetry, inclusion, occlusion, precipitate, surface adsorbate
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