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JAMB Chemistry 2013 Question 21

Question 21

Acids, Bases and Salts

An insoluble salt can be prepared by

  1. A.the reaction of trioxocarbonate(IV) with an acid.
  2. B.double decomposition.
  3. C.the action of dilute acid on an insoluble base.
  4. D.the reaction of metals with an acid.
Show the answer and explanation

Answer: B (double decomposition.)

Explanation

Mixing solutions of two soluble salts precipitates the insoluble salt (double decomposition), which is filtered off.