QUESTIONS (CHEMICAL EQUATIONS AND HARDNESS OF WATER)

                                                   

                                            WEEKLY TEST

1)Define the following terms
              a)Spectator ions
              b)ionic equation
              c)redox reaction

2)Differentiate between ionic and molecular equations.

3)Using equations,explain the following types of reactions.
             a)precipitation reaction
             b)synthesis reaction
             c)displacement reaction
4)complete and balance the following
           a)Zn(NO₃)_{2(s) →
            b)}Cu_(s) + HNO_{3(aq)→
            c)}Na₂CO_3(aq) + Ca(HCO₃)_{2(aq)→
            d)}NH_3(g)  + Cl_2(g)→
5)Give two advantages and two disadvantages of  hard water.
6)explain how an  ion exchanger works in removing hardness of water.
7)explain four ways of removing permanent hard ness of water.
8)differentiate between hard water and soft water.
9)state the causes of permanent and temporary hardness of water.
10)give the meaning of the following
               a)soft water
               b)hard water
               c)permanent hard water