Ammonium hydroxide (NH3[aq]), also known as ammonia water, ammonical liquor, ammonia liquor, aqua ammonia, aqueous ammonia, or ammonia solution is a solution of ammonia in water. Commonly used as a cleaning agent in conservation, however extreme caution must be used with handling this product as it is highly corrosive. Like other gases, ammonia exhibits decreasing solubility in solvent liquids as the temperature of the solvent increases. "Ammonium hydroxide" solutions decrease in density as the concentration of dissolved ammonia increases. At 15.5556 C, the density of a saturated solution is 0.88 g/mL and contain 35% ammonia by mass, 308g/L w/v, (308 grams of ammonia per litre of solution) and have a molarity of approximately 18 mole/L. At higher temperatures, the molarity of the saturated solution decreases and the density increases.
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