Question

Please write net ionic equations for the reacions, if any, occuring when dilute solutions of the following are mixed. (NR= no rxn)

a. NH₄Cl, KNO₃, NaOH, heated

b. CaCl₂, Ba(NO₃)_2, 1M NH₃

c. CaCl_2, Ba(NO_3)2, 1M NaOH

d. Ca(NO₃)₂, K₂CrO4

e. mixture from d + BaCl₂

f. mixture from e + HCl

g. mixture from f + Na₂SO₄

h. BaCl₂, KNO₃, ZnCl₂, H₂S

i. KCl, (NH₄)₂CO₃, Ba(NO₃)₂

j. CaCO₃ (s), NH₄Cl, 6M HC₂H₃O₂

k. mixture from g + K₂C₂O₄, NH₃

Answer 1

a) K+, Na+, NO3- always soluble.
Cl- is soluble with all the positive ions in this case...
NH4+ and OH- form precipitate [insoluble]
NH₄⁺ + OH^- --> NH3 + H2O

b) NR

c) NR

d) Ca²⁺ + CrO₄^2- --> CaCrO₄

e) Ca²⁺ + CrO₄^2- --> CaCrO₄
Ba²⁺ + CrO4^2- --> BaCrO₄

f) BaCrO₄ + Cl^- -------> BaCl₂

g) BaCl₂ +SO₄^2- -----> BaSO4

h) Ba²⁺ + S^2- --> BaS
Zn²⁺ + S^2- --> ZnS

i) Ba²⁺ + CO₃^2- --> BaCO₃

j) CaCO₃ + 2HC₂H₃O₂ --> H₂O + CO₂ + Ca²⁺ + 2C₂H₃O₂^-

k) BaSO4 from reaction (g) added to
NH₃ + HC₂H₃O₂ --> NH₄⁺ + C₂H₃O₂^-