Because aqueous ammonia is a gas dissolved in water, as the water evaporates from a window, the gas evaporates also, leaving the window streak-free. ![]() In contrast to anhydrous ammonia, aqueous ammonia finds few non-niche uses outside of cleaning agents.ĭiluted (1–3%) ammonia is also an ingredient of numerous cleaning agents, including many window cleaning formulas. Upon warming saturated solutions, ammonia gas is released. At higher temperatures, the molarity of the saturated solution decreases and the density increases. At 15.6 ☌ (60.1 ☏), the density of a saturated solution is 0.88 g/ml and contains 35.6% ammonia by mass, 308 grams of ammonia per litre of solution, and has a molarity of approximately 18 mol/L. Ammonia solutions decrease in density as the concentration of dissolved ammonia increases. ![]() Like other gases, ammonia exhibits decreasing solubility in solvent liquids as the temperature of the solvent increases. In aqueous solution, ammonia deprotonates a small fraction of the water to give ammonium and hydroxide according to the following equilibrium:
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