Question

2. Give the chemical equation of double displacement reaction. ​

Answer 1

Answer:

Those reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions. ... A double replacement reaction is represented by the general equation. AB + CD → AD + CB. In a double displacement reaction, atoms from two different compounds switch places.

Answer 2

Answer:

Double-displacement reaction : A reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds. The general form of a double-replacement (also called double-displacement) reaction is:

AB + CD → AD + CB

In this reaction, A and C are positively-charged cations, while B and D are negatively-charged anions. Double-replacement reactions generally occur between substances in aqueous solution. In order for a reaction to occur, one of the products is usually a solid precipitate, a gas, or a molecular compound such as water.

Example :

Example : 2KI(aq) + Pb(NO3)2(aq) → 2KNO3(aq) + PbI2(s)

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