This acid is sometimes called "oil of vitriol," and when pure should be almost, or quite colorless, and should be kept in a strong bottle with a close fitting glass stop¬per, as the particles of dust, wood, cork, or other organic matter quickly imparts a dark, brownish color to it.
When diluting this acid it is highly important that the acid shoidd be poured very slowly into the water, and never the reverse. Both the acid and water should also be quite cold, as great heat is evolved upon mixing them. Shoidd a quantity of hot watet be suddenly added to an equal amount of sulphuric acid, a violent explosion is almost cer¬tain to take place.
ELECTRO PLATİNG MATERIALS etiketine sahip kayıtlar gösteriliyor. Tüm kayıtları göster
ELECTRO PLATİNG MATERIALS etiketine sahip kayıtlar gösteriliyor. Tüm kayıtları göster
AQUA REGIA
AQUA REGIA
This acid is a mixture of nitric and hydro-chloric acids in the proportion of one volume of nitric and from one to three parts of hydro-chloric acids, the strongest and best results being obtained when the propor¬tions are about one of nitric and two of hydro¬chloric acids. It should not be prepared until required for immediate use, as it deteriorates rapidly.
This acid is a mixture of nitric and hydro-chloric acids in the proportion of one volume of nitric and from one to three parts of hydro-chloric acids, the strongest and best results being obtained when the propor¬tions are about one of nitric and two of hydro¬chloric acids. It should not be prepared until required for immediate use, as it deteriorates rapidly.
HYDROCHLORIC ACID
HYDROCHLORIC ACID
This acid is best known as muriatic acid, and when pure should
be almost colorless, and of a specific gravity not
less than 1200 This acid is formed by the
chemical union, or combination of hydrogen
and chlorine. Hence the name hydrochloric
acid.
This acid is best known as muriatic acid, and when pure should
be almost colorless, and of a specific gravity not
less than 1200 This acid is formed by the
chemical union, or combination of hydrogen
and chlorine. Hence the name hydrochloric
acid.
WHAT İS THE NITRIC ACID?
NITRIC ACID
This acid is sometimes aqua fortis. Only the best and strongest acid should be used for dissolving silver to form the nitrate of silver. A small portion of it largely diluted with pure distilled water should form no cloud upon the addition of a drop of a strong solution of nitrate of silver. It should be kept in strong well stoppered bottles, in a dark, cool and dry place.
Care should be taken not to inhale any of the fumes that arise from the acid.
Should a drop of this or any other acid fall upon the clothes, apply freely and at once, a quantity of diluted aqua ammonia.
This acid is sometimes aqua fortis. Only the best and strongest acid should be used for dissolving silver to form the nitrate of silver. A small portion of it largely diluted with pure distilled water should form no cloud upon the addition of a drop of a strong solution of nitrate of silver. It should be kept in strong well stoppered bottles, in a dark, cool and dry place.
Care should be taken not to inhale any of the fumes that arise from the acid.
Should a drop of this or any other acid fall upon the clothes, apply freely and at once, a quantity of diluted aqua ammonia.
WATER
The water used in all plating opera¬tions, both in mixing the various chemicals, and in making the plating solutions, should either be distilled or well filtered rain water ; spring and well water invariably containing various impu¬rities, very detrimental to the working of the solutions. It should form no cloud upon the addition of a few drops of nitrate of silver.
WHAT İS THE FULMINATE OF GOLD?
FULMINATE OF GOLD
This salt is a dark, brown powder, and veiy highly explosive. It is formed by the addition of ammonia, or a solu¬tion of any salt of ammonia to a solution of chloride of gold. It is sometimes used in form¬ing electro-gilding solutions, but owing to its dangerous properties, the inexperienced operator should never undertake its manufacture.
This salt is a dark, brown powder, and veiy highly explosive. It is formed by the addition of ammonia, or a solu¬tion of any salt of ammonia to a solution of chloride of gold. It is sometimes used in form¬ing electro-gilding solutions, but owing to its dangerous properties, the inexperienced operator should never undertake its manufacture.
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