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In aqueous solution, ammonia deprotonates a small fraction of the water to give ammonium and hydroxide according to the following equilibrium: . NH 3 + H 2 O ⇌ NH + 4 + OH −.. In a 1 M ammonia solution, about 0.42% of the ammonia is converted to ammonium, equivalent to pH = 11.63 because [NH +
Ammonia is moderately basic; a 1.0 M aqueous solution has a pH of 11.6, and if a strong acid is added to such a solution until the solution is neutral (pH = 7), 99.4% of the ammonia molecules are protonated. Temperature and salinity also affect the proportion of ammonium [NH 4] +.
If the pH is low, the equilibrium shifts to the right: more ammonia molecules are converted into ammonium ions. If the pH is high (the concentration of hydrogen ions is low and hydroxide ions is high), the equilibrium shifts to the left: the hydroxide ion abstracts a proton from the ammonium ion, generating ammonia.
Ammonium carbamate is a chemical compound with the formula [NH 4][H 2 NCO 2] consisting of ammonium cation NH + 4 and carbamate anion NH 2 COO −.It is a white solid that is extremely soluble in water, less so in alcohol.
Vapor over anhydrous ammonia [5]; Temp. Pressure ρ of liquid : ρ of vapor : Δ vap H: −78 °C: 5.90 kPa: −75 °C: 7.93 kPa 0.73094 g/cm 3: 7.8241×10 −5 g/cm 3: −70 °C: 10.92 kPa 0.72527 g/cm 3
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Freshwaters tend to have a wide range of pH values from 6.5 to 9. [25] Freshwaters that have a higher pH would be more sensitive to increases in ammonia due to the balance between ammonia and ammonium and the aquatic life would be more affected. The ammonia causes stress on the fish and damages internal organs which will eventually lead to ...
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