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Aqua ___ (gold dissolver)
Answer for the clue "Aqua ___ (gold dissolver) ", 5 letters:
regia
Alternative clues for the word regia
Word definitions for regia in dictionaries
Wikipedia
Word definitions in Wikipedia
Regia is a classical building type: a place where a governing authority resides. It is among the ancient building types. Others are the tholos, the temple, the theater, the dwelling, and the shop. Buildings according to this type may be rectangular in plan ...
Usage examples of regia.
They were certainly not in the Regia, nor were they similar to the stone tablets he had found.
He went instead first to the Regia, where he prayed and sacrificed upon the altar and lit a fire in the sacred hearth.
After that he set himself up in the official domain of the Pontifex Maximus just behind the Regia, lit all the lamps, sent for the Regia priestlings, and made sure there were enough chairs for the pontifices at present in Rome.
The animal was killed with a spear, after which its head was severed and piled over with little cakes, while its tail and genitalia were rushed to the Regia in the Forum Romanum, and the blood dripped onto the altar inside the Regia.
His official headquarters had the status of an inaugurated temple: the little old Regia in the Forum Romanum just outside his State house.
His official headquarters were inside the Regia, but this tiny archaic building held no space for offices, so he worked next door.
Ops, for she had an altar in the Regia of more importance to the state religion.
But first he had to deal with the Regia and the offices of the Pontifex Maximus.
The Regia was the oldest building in the Forum, for it was said to have been the house of Numa Pompilius, second King of Rome.
Generally it answers the same purpose as aqua regia, and is employed where the addition of nitric acid to a solution has to be specially avoided.
When the purer metal is required, gold should be dissolved in aqua regia, the solution evaporated to a paste, diluted, allowed to stand, and filtered.
In alloys it may be found by dissolving them in nitric acid or in aqua regia, evaporating with hydrochloric acid, and treating the filtrate with ammonic chloride and alcohol.
They are soluble in nitric acid or aqua regia, and, provided the solution is sufficiently acid, they remain dissolved.
The reduced metal is only slowly dissolved by hydrochloric acid, and although it is readily soluble in aqua regia, the solution cannot be evaporated or freed from the excess of acids, by boiling, without loss of tin, because of the volatility of stannic chloride.
This may be got rid of by boiling in aqua regia, and dissolving out the tungstic acid which has been liberated by means of ammonia.