question_answer

  What is the difference between displacement and double displacement reactions?         Write equations for these reactions.

Answer:

                  In a displacement reaction, a more reactive element displaces or removes another element from its compound. For example, zinc being more reactive, displaces copper from its compound.                 Zn(s) + CuSO4(aq) ® ZnSO4(aq) + Cu(s) In case of double displacement reactions, two compounds react by exchanging their ions and form two new compounds. For example, silver and sodium exchange their ions,   3 and ? respectively and form two new compounds in the following reaction.