giving suitable example differentiate between single displacement and double displacement reaction
Answers
A single-replacement reaction replaces one element for another in a compound. ... A double-replacement reaction exchanges the cations (or the anions) of two ionic compounds. A precipitation reaction is a double-replacement reaction in which one product is a solid precipitate.
DR reactions must form a precipitate while SR may, but usually do not.
DR reactants must both be aqueous because two solid compounds won’t react; the single replacing element in SR reactions can be in any state.
Both SR and DR reactions are exothermic. It releases more energy to form the new bond than to break the original one.
SR reactions won’t take place if the replacing element is lower on the activity series than the element it is supposed to replace. For example, Ni (s) + Fe(NO3)2 (aq) = no reaction, because iron is more reactive than nickel.
DR reactions won’t happen if both the reactants and products have high solubility. Ex. NH4Cl (aq) + CoSO4 (aq) = no reaction, as both ammonium sulphate (NH4)2SO4 and cobalt (II) chloride CoCl2 readily dissolve in water.
