Question

whoch of the following will be spectator ions in the reactiom in aqueous solution of lead (II) nitrate and potssium chloride?

a- pb2+ and cl-
b- k+ and cl-
c- pb2+,k+,cl-, and NO3-
d- pb2+ and NO3-
e- k+ and NO3-

2- An aquesous solutoin of potassium chloride is mixed with an aquesous solution of soduim nitrare.
the complate inoic equation contains which of the following species (when balanced in standered form)

a- 2Na+(aq)
b- cl-(aq)
c-2k+(aq)
d- 3NO3- (aq)
e- 2KNO3 (aq)

please help!!

Answer 1

1) In the reaction of aqueous lead nitrate with aqueouspotassium chloride , the spectrator ions are potassium and nitrate ions as they are still in aqueous medium, while lead chloride precipitates out.

Pb ⁺² +2NO₃^- +2K⁺ +2 Cl^-   -------> PbCl_2(s) + 2NO₃^- +2K⁺

option e is correct.

2)When aqueous potassium chloride is mixed with aqueous sodium nitrate solution, no precipitation occurs , thus all the ions remain in solution.

Thus the complete ionic equation has all the ions, namely, K+,Cl-,Na+ and NO3- in solution.

  Na ⁺ +NO₃^- +K⁺ + Cl^- ------->  Na ⁺ +NO₃^- +K⁺ + Cl^-