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Explain about Parke Process?
Parke method for refining lead, which is also a concentration process for silver, relies upon the selective dissolution of silver in molten zinc. Small amount of zinc, 1-2%. is included to molten lead which contains silver as an impurity. Silver is much more soluble in zinc than in lead; zinc adn lead are insoluble in each other. Therefore, most of the silver concentrates in zinc, which comes to the top of molten lead. The zinc layer solidifies first upon cooling: it is replaced and silver is obained by distilling off zinc, which is collected and used over and over again.
Explain the Liquid junctions? Some galvanic cells contain two electrolyte solutions with different compositions. These solutions must be separated by a porous barrier or some o
Electron configurations are governed by a limitation called as the Pauli Exclusion Principle: No two electrons can have the same value for all four quantum numbers n, l, m a
Determine the alcoholic acidity of the given sample of flour. After undertaking this activity, you will be able to: • assess the acidity the given sample of flour, and •
How can we make best use of marigold flowers
Preparation of saturated calomel electrode and determination of standard potentials of electrodes such as Cu 1 Cu, Zn 1 Zn, etc. Comparison of the potential values with values from
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Energy of the electron in Hydrogen atom is given by: (1) E n = 131.38/ n 2 x kj mol -1 (2) E n = 131.33/n xkj mol -1 (3) E n = 1313.3/ n 2 x kj mol
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