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Ammonia gas has characteristic properties which are used to identify it.
Some of Physical properties are:
Color: colorless
odor: characteristic strong pungent smell(ammoniacal smell )
Physiological nature: causes an irritating, burning sensation in upper part of nasal passage, fatal in large doses.
Density: Lighter than air (V.D of ammonia = 8.5)
Melting point: -77.70C
Boiling point: -33.40C
But physical properties can't be relied to identify a substance, therefore chemical tests should be used.
Chemical tests:
1. A glass rod dipped in conc. HCl acid brought near ammonia gas gives dense white fumes. This is due to formation of Ammonium Chloride
NH3 + HCl ---> NH4Cl
2. When ammonia is passed through Copper sulfate solution a pale blue precipitate of copper hydroxide is formed.
3.Colorless Nessler's Reagent turns pale brown and on passing excess ammonia gives a brown precipitate.
2K2[HgI4] + NH3 + 3KOH ---> H2N.HgO.HgI + 7KI + 2H2O
(nessler's reagent) (Brown ppt.)
4.All salts of ammonia on heating with alkali produce ammonia gas which can be identified
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How do you identify ammonia?
ammonia has gas odour like urine so it can be eaisly identifiable
Give one test to identify HCL gas-?
One way to test a gas to identify it as an HCL gas is to dip a glass rod in ammonia and place it in the gas. If a white smoke is produced, the gas is HCL gas.
Among the following identify the reaction which is a synthesis as well as an exothermic reaction.Formation of carbon dioxide from limestoneFormation ammonia from its constituentsFormation of ammonium chloride from ammonia and hydrogen chloride?
If you mix Ammonia as well as Hydrogen chloride, you will get ammonium chloride. It is given by NH3 (g) + HCl (g) → NH4Cl(s)
Is ammonia gas is dangerous to human being?
Ammonia is highly toxic to human beings. Though the scientists are not able to identify the cause of the toxicity but they have certain speculations. The ammonia toxicity finally leads to a state called as comatose state that is accompanied by cerebral edema (increase in the water content of cerebrum.
What is a cation test?
Testing for cations is a test used in chemistry to identify metal or metal ions (cations) found in compounds. ... This test uses sodium hydroxide or aqueous ammonia to test and identify metal ions by the precipitation formed.
Where and how toxic ammonia converted into non toxic ammonia?
Ammonia is ammonia and ammonia is toxic. Non-toxic ammonia does not exist. Ammonia can be diluted in water or held in a sealed container, but it's still toxic.
What is the percent of ammonia in anhydrous ammonia?
99.95%(pure ammonia) or better is Refridgeration grade ammonia.
What is the difference between anydrous ammonia and aqueous ammonia?
Anhydrous ammonia is pure ammonia. Under normal conditions it is a gas, but it is usually stored as a liquid under pressure. Aqueous ammonia is ammonia dissolved in water. Household ammonia is a 3% solution of aqueous ammonia.
What is ammonia D?
It is regular old ammonia -- NH3. "Ammonia-D" is a trademarked name for ammonia in Windex.
Does freezing ammonia destroy its properties?
No. Frozen ammonia is still ammonia.
Why is ammonia good?
Generally ammonia is a gas. There are many uses with ammonia.
Is Ammonia heterogeneous or homogeneous mixtures?
Ammonia is a compound, not a mixture. Household ammonia is a homogeneous mixture of ammonia and water.
