What do you mean by a precipitation reaction ? Explain by giving examples.

Explanation

(a) Any rcaction in with an insoluble solid is produced is called a precipitate reaction. For cxample:
`underset ("Choride Sulphate")underset("Barium Sodium")(BaCl_(2aq)+Na_(2)SO_(4aq))overset("Heat")rarr underset("Sulphate") underset("Barium")(BaSO_(4("S")))darrunderset("Choride")underset("Sodium")(2NaCl_((aq)))`
(b) Oxidation : It is defined as process which involves gain of oxygen
For exumple :
`underset("Magnesium")2Mg_(("s")) underset("Oxygen")(+O_(2)("g"))rarr underset("Magnesiumoxide")(2MgO_(("s")))`
Reduction : t is defined al process which involver loss of oxygen.
For example :
`underset("oxide")underset("copper")(CuO_(("s")))+ underset("hydrogen")(H_(2("g")))overset("Heat")rarrunderset("copper")(Cu_(("s"))+)underset("water")(H_(2)O_(("g")))`