Hydrofluoric acid etches glass by reacting with the silica in it according to the following equation. ΔH° = 54.5 kJ and ΔS° = 436.5 J mol-1K-1 Calculate ΔG° at 25°C for this reaction.

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Q: Question 28 The action of some commercial drain cleaners is based on the following reaction: 2 NaOH…

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Q: Why are alcoholic solutions used in the hydroxamic acid test for esters?

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.