Question

when we add to chemical first is..Ammonium +Hydroxide​

Answer 1

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when we add to chemical first is..Ammonium +Hydroxide

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We know that ammonia solution is ammonium hydroxide. When added in small quantity(dropwise), a reddish-brown precipitate of Fe(OH)3 is formed. This precipitate is insoluble in excess of ammonia solution.

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What is NH4OH (Ammonium Hydroxide)?

↪ NH4OH is the chemical formula of a solution of ammonia in water. This solution is known by various names such as ammonia water, ammonium hydroxide, ammonia liquor, and aqueous ammonia. NH4OH is often denoted by the symbol ‘NH3 (aq)’

Saturated Solutions of Ammonium Hydroxide

↪ The solubility of ammonia decreases with the increase in temperature of the water solvent. It can be observed that this behaviour of ammonia is quite similar to that of other gases. The solution of ammonia in water exhibits a decrease in its density with the increase in the concentration of dissolved ammonia.

The solubility of ammonia decreases with the increase in temperature of the water solvent. It can be observed that this behaviour of ammonia is quite similar to that of other gases. The solution of ammonia in water exhibits a decrease in its density with the increase in the concentration of dissolved ammonia.The density of a saturated ammonium hydroxide solution at 288.75 K is equal to 0.88 grams per mole. This saturated solution of ammonium hydroxide would contain approximately 35.6% ammonia by mass which corresponds to 308 grams of ammonia per litre of saturated ammonium hydroxide solution.

Properties of Ammonium Hydroxide (NH4OH)

↪ An NH4OH solution has the following properties in its standard state:

• An NH4OH solution has the following properties in its standard state:NH4OH has a molar mass of 35.04 grams per mole.
• An NH4OH solution has the following properties in its standard state:NH4OH has a molar mass of 35.04 grams per mole.It has a colourless appearance in its liquid state.
• Ammonium hydroxide solutions have a highly pungent, “fishy” odour.
• Ammonium hydroxide solutions have a highly pungent, “fishy” odour.It has a density of 0.91 grams per cubic centimetre for a 25% w/w solution. A 35% w/w solution would have a density of 0.88 grams per cubic centimetre.
• Ammonium hydroxide solutions have a highly pungent, “fishy” odour.It has a density of 0.91 grams per cubic centimetre for a 25% w/w solution. A 35% w/w solution would have a density of 0.88 grams per cubic centimetre.Ammonium hydroxide solution with a 25% mass fraction has a melting point of 215.7 K and a boiling point of 310.8 K
• Ammonium hydroxide solutions have a highly pungent, “fishy” odour.It has a density of 0.91 grams per cubic centimetre for a 25% w/w solution. A 35% w/w solution would have a density of 0.88 grams per cubic centimetre.Ammonium hydroxide solution with a 25% mass fraction has a melting point of 215.7 K and a boiling point of 310.8 KIts standard enthalpy of formation is -80 Kilojoules per mole.

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Answer 2

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