What is a precipitation reaction?
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what is precipitation reaction?
Precipitation reactions: When an insoluble solid called a precipitate forms when reactants are formed together.
For example, when carbon Dioxide is mixed with Calcium Hydroxide (Limewater), The precipitate Calcium carbonate is formed.
Ca(OH)2+CO2 → H2O+CA
Calcium Carbonate is founding chalk!
Precipitation reaction is the process where from a solution, after a reaction, it is separate a compound, fully or partially insoluble in the form of crystals, powder, flakes, etc..Thus, at the treatment of a solution of silver nitrate with a solution of sodium chloride silver chloride is precipitated immediately :
AgNO3 + NaCl -> AgCl + NaNO3
A precipitate is a solid very little soluble, formed after the reaction in solution. The reaction of the solution from potassium iodide, KI, with a solution of lead nitrate, Pb (NO3) form a yellow precipitate of lead iodide, PbI2.The precipitate obtained, iodine lead, PbI2, is very slightly soluble in water. Solubility is the maximum amount of a substance which is dissolved in a certain quantity of solvent, at a certain temperature. Very slightly soluble substances are considered soluble electrolytes.
Solubility product is the size which indicates the possibility of ions to move in a heavy soluble form, solubility values of the product explain the formation and dissolution of precipitated solution. Therefore, knowledge of this size has a great importance in choosing the methods for qualitative and quantitative analysis. From the solubility product value can be calculated solubility (S).
Precipitation Reactions occur when cations and anions of aqueous solutions combine to form an insoluble ionic solid, called a precipitate. Whether or not such a reaction occurs can be determined by using the solubility rules for common ionic solids.
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