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Theory guides and experiment decides (I. M. Kolthoff). Sometimes thermodynamics predicts a reaction but it does not occur very fast because its kinetics is slow. If you dissolve iron (III) chloride in pure denionized water, assuming it is from a fresh bottle, it will take hours to form a precipitate of iron hydroxides. Therefore, in order to perform this ...


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Aqua regia doesn't actually dissolve lead metal. It converts to insoluble lead salt. From here: When we are working with an acidic chloride solution, like HCl (with an oxidizer) or aqua regia, most of the lead will become an insoluble lead chloride which if it is left to settle can be removed by careful decanting of the solution and filtering, what lead ...


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Metallic osmium is harmless but it reacts with oxygen at room temperature, forming volatile osmium tetroxide. Any other osmium compounds are also converted to the tetroxide if oxygen is present. This makes osmium tetroxide the main source of contact with the environment and human body. Exposure to osmium tetroxide cause harm to the skin, eyes, and ...


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TL;DR: Decomposition of nitrites always afford $\ce{NO2}$ if you apply the correct reaction condition to it. Long answer To generalize the decomposition of metal nitrates (I concluded from the article above, and hereby using a generic monovalent metal M for the equations), we can say this: The first stage of decomposition is always the decomposition to ...


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First and foremost, d-block elements and transition elements are two different entities. These terms become not exchangeable as you start using current IUPAC definition of transition element (see M. Farooq's answer). Older textbooks included entire d-block, including Group 12 elements, into transition elements cohort because historically the name "...


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The number of orbitals per shell (n) is n2. At most there are two electrons per orbital, each with opposite spin. However, due to nuclear screening, the subshells (n and l), and as a result the orbitals (n, l, and ml) are not of the same energy. When you get to more complicated situations, such as the third row transition metals, and you see exceptions such ...


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http://www.chm.bris.ac.uk/motm/oso4/oso4h.htm https://www.epa.gov/sites/production/files/2014-09/documents/osmiumtetroxide_interim_ornl_jun_2008c.pdf https://www.michigan.gov/documents/mdch-osmium_tetroxide_fs_109244_7.pdf Osmium tetroxide is an incredibly strong oxidant: it is stronger as an oxidant than the halogens and also oxidizes halides back to their ...


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Copper is a very good dehydrogenating and dehydrating agent. When a primary alcohol is heated in presence of copper than one hydrogen connected to oxygen and another connected to carbon leave in the form of hydrogen gas converting it into an aldehyde. Further oxidation of the aldehyde into a carboxylic acid is not favourable. A secondary alcohol is converted ...


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The term "transition" has a geometric origin. The periodic table contains big and small columns, The big columns are number $1$, $2, 13, 14$, etc. The small columns are number $3$ to $12$, and they are all situated in the "transition" zone between the big columns $2$ and $13$. So $\ce{Zn}$ and the other elements of the column $12$ are ...


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