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When you dissolve copper metal in nitric acid why must the reaction be performed in the hood?
The reaction between copper metal and nitric acid produces toxic nitrogen dioxide gas. Working in the hood helps to contain and safely remove these fumes, protecting you from potential health risks associated with their inhalation. Additionally, the hood provides proper ventilation to prevent the accumulation of the toxic gas in the laboratory.
Why add dilute nitric acid with silver nitrate to test for halide ions?
The nitric acid reacts with other ions that might precipitate with silver nitrate. Doing this first gets these other unwanted precipitates out of the way. If you are testing with Fluoride as your halide remember that silver nitrate does not precipitate with Fluoride, so no precipitate does not mean that halide ions are not present.
Does sulphuric acid remove copper from gold?
Sulfuric acid is not typically used to remove copper from gold, as it can also affect the gold itself. Other methods, such as leaching with cyanide or nitric acid, are commonly used to separate copper from gold. These methods are more selective in targeting the copper without damaging the gold.
How do you separate a mixture of iron filings copper sulphate cystals and chalk powder?
Use a magnet to remove the iron filings from the mixture, then mix the remaining components with water. The copper sulfate will dissolve but the CaCO3 (chalk powder) will not. Filter the mixture to remove the chalk, then boil the water to recover the copper sulfate.
How do you remove mercury from a silver coin?
To remove mercury from a silver coin, you can use a process called amalgamation. This involves heating the coin in a solution of nitric acid to dissolve the mercury, leaving behind the purified silver. It is important to handle mercury with extreme caution due to its toxicity and to follow proper safety protocols when performing this procedure.
When you dissolve copper metal in nitric acid why must the reaction be performed in the hood?
The reaction between copper metal and nitric acid produces toxic nitrogen dioxide gas. Working in the hood helps to contain and safely remove these fumes, protecting you from potential health risks associated with their inhalation. Additionally, the hood provides proper ventilation to prevent the accumulation of the toxic gas in the laboratory.
Why add dilute nitric acid with silver nitrate to test for halide ions?
The nitric acid reacts with other ions that might precipitate with silver nitrate. Doing this first gets these other unwanted precipitates out of the way. If you are testing with Fluoride as your halide remember that silver nitrate does not precipitate with Fluoride, so no precipitate does not mean that halide ions are not present.
Does sulphuric acid remove copper from gold?
Sulfuric acid is not typically used to remove copper from gold, as it can also affect the gold itself. Other methods, such as leaching with cyanide or nitric acid, are commonly used to separate copper from gold. These methods are more selective in targeting the copper without damaging the gold.
How do you separate a mixture of iron filings copper sulphate cystals and chalk powder?
Use a magnet to remove the iron filings from the mixture, then mix the remaining components with water. The copper sulfate will dissolve but the CaCO3 (chalk powder) will not. Filter the mixture to remove the chalk, then boil the water to recover the copper sulfate.
Why do you use brasso or some acidic substance to clean a tarnished copper surface?
To dissolve the hydrated cooper carbonate or to remove this coating by erosion.
How do you remove mercury from a silver coin?
To remove mercury from a silver coin, you can use a process called amalgamation. This involves heating the coin in a solution of nitric acid to dissolve the mercury, leaving behind the purified silver. It is important to handle mercury with extreme caution due to its toxicity and to follow proper safety protocols when performing this procedure.
How do you remove colour from copper sulphate using anhydrous?
To remove color from copper sulfate using anhydrous, you can mix the anhydrous copper sulfate with a small amount of water to dissolve the compound. Then filter the solution to separate the insoluble impurities. Finally, evaporate the water to obtain anhydrous copper sulfate in its white color form.
What is function of nitric acid?
The important uses of nitric acid are:1 Nitric acid plays a significant role in the manufacture of various products such as:Explosives like trinitrotoluene (T.N.T.) nitro glycerine, cotton, nal etc.Fertilizers such as calcium nitrate, nium nitrate etc.Nitrate salts such as calcium nitrate, silver nitrate, nium nitrate.Dyes, perfumes, etc. from coal tar products.Sulphuric acid by Lead Chamber process.2 It is used in the purification of silver, gold, platinum etc.3 Nitric acid is used in etching designs on copper, brass, bronze ware etc.4 It is used to prepare "aqua regia" to dissolve the noble elements.5 It is used as a laboratory reagent.
What acid will dissolve lead?
Answer: None, but some caustic solutions will.(reverse) electroplating solution from http://yarchive.net/metal/mercury.html: [edited for this page/topic] ... about 3 volts of dc current from abattery or power supply, electrolyte solution of household ammonia,some wire and two battery clips. Three volts should be plenty andmore is not necessarily better. Perhaps 100-200 milliamps for a start.... connect the plus side of the power supply to an aluminum rod andthe minus side to the brass to be dissolved.Dangerous from http://www.mspong.org/cyclopedia/metallurgy.html:[edited for this page/topic] Dissolve 4 1/2 lbs. potassa [potash]in 1 gal. of water. Lastly, dissolve 8 oz. cyanide of potassiumin 1 gal. of hot water. Mix.Commercial product: http://www.sharpshootr.com/wipeout.htmVia Salt Solution: http://www.springerlink.com/content/tl2p25771l650xhu/"Fouling removal solvents happily dissolve brass ..."from: http://www.stoppingpower.net/forum/post.asp?method=ReplyQuote&REPLY_ID=151525&TOPIC_ID=12329&FORUM_ID=28
How would one remove an silver or aluminium coating from a telescope mirror made of pyrex glass?
To remove a silver or aluminum coating from a telescope mirror made of Pyrex glass, you can use a mixture of nitric acid and distilled water. Place the mirror in the solution and the coating should dissolve over time. Be sure to wear protective gear and work in a well-ventilated area when handling acids.
Why is copper sulphate crystals gently washed with alchohol?
Copper sulfate crystals are washed with alcohol to remove any impurities or excess water that may be present on the surface of the crystals. Alcohol can help to dissolve these impurities and evaporate quickly, leaving behind clean and pure copper sulfate crystals.
What removes copper from gold?
One common method to remove copper from gold is through a process called cupellation, where the gold-copper alloy is heated in a furnace with lead, which combines with the copper to form a separate layer called "dore." Another method is through electrolysis, where an electric current is passed through the gold-copper alloy in a solution to separate the copper ions from the gold.
