Some Sodium Chloride salt is dissolved in water. Some of the salt dissolves. While some other salt settles at the bottom of the chemical tube. When viewed on an atomic scale, the dissolved salt is in the form of Na⁺ ions and Cl⁻ ions. The salt that settles is in the form of NaCl molecules. In further analysis, salt ions and salt molecules form an equilibrium reaction. When NaCl molecules ionize into Na⁺ ions and Cl⁻ ions, at the same time Na⁺ ions and Cl⁻ ions form NaCl molecules. This process causes the ions dissolved in water to have the same amount.
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00:00Some sodium chloride salt is dissolved in water.
00:05Some of the salt dissolves, while some other salt settles at the bottom of the chemical tube.
00:13When viewed on an atomic scale, the dissolved salt is in the form of sodium ions and chloride ions.
00:21The salt that precipitates is in the form of sodium chloride molecules.
00:27In further analysis, salt ions and salt molecules form an equilibrium reaction.
00:33When NaCl molecules ionize into Na plus ions and Cl minus ions,
00:41at the same time Na plus ions and Cl minus ions form NaCl molecules.
00:53This process causes the ions dissolved in water to have the same amount.
00:58Mathematically, this chemical reaction can be written as follows.
01:02NaCl solid, left right arrow, Na plus aqueous, plus Cl minus aqueous.
01:09This is the equilibrium reaction of the solubility of sodium chloride.
01:21To understand this concept, write the equilibrium reaction of the following solutes.
01:30Well, in case A, when put into water, some of the silver nitrate ionizes into Ag plus ions and nitrate ions,
01:39while the rest is still in the form of silver nitrate molecules.
01:45So the equilibrium reaction is AgNO3 solid, left right arrow, Ag plus aqueous, NO3 minus aqueous.
01:55In case B, when put into water, some of the barium bromide ionizes into Ba2 plus ions and 2Br minus ions,
02:04while the rest is still in the form of barium bromide molecules.
02:12So the equilibrium reaction is BaBr2 solid, left right arrow, Ba2 plus aqueous, plus 2Br minus aqueous.
02:22In case C, when put into water, some of the potassium sulfate ionizes into 2K plus ions and sulfate ions,
02:31while the rest is still in the form of potassium sulfate molecules.
02:38So the equilibrium reaction is K2SO for solid, left right arrow, 2K plus aqueous, plus SO for 2 minus aqueous.
02:48Yup, hopefully this tutorial can provide an overview of the equilibrium reaction in the solubility of substances.
02:55Don't forget to follow this channel.