aqua regia वाक्य
उदाहरण वाक्य
मोबाइल
- Ruthenium dissolves in fused alkalis to give ruthenates ( ), is not attacked by acids ( even aqua regia ) but is attacked by halogens at high temperatures.
- However, aqua regia does not dissolve or corrode silver, titanium, iridium, ruthenium, rhenium, tantalum, niobium, hafnium, osmium, or rhodium.
- Gold resists attacks by individual acids, but it can be dissolved by the aqua regia ( nitro-hydrochloric acid ), so named because it dissolves gold.
- In his attempts to produce pure platinum metal in 1804, W . H . Wollaston added mercuric cyanide to a solution of impure platinum metal in aqua regia.
- If necessary, the tube may be filled with an oxidizing solution of aqua regia or piranha solution ( H 2 O 2 / H 2 SO 4 ).
- The main problem with the process was that it required glass-lined containers due to the aqua regia, and mechanisms for safe handling of the radioactive material.
- To get the gold to a very high level of purity ( 999 fine gold ) it is sometimes processed further with aqua regia to effectively remove all the impurities.
- Despite its broad range of compounds in numerous oxidation states, osmium in bulk form at ordinary temperatures and pressures resists attack by all acids and alkalis, including aqua regia.
- Chloroauric acid, HAuCl 4, the product formed when gold dissolves in aqua regia, is sometimes referred to as " gold chloride " or " acid gold trichloride ".
- The discovery that aqua regia, a mixture of nitric and hydrochloric acids, could dissolve the noblest metal, gold, was to fuel the imagination of alchemists for the next millennium.
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