Chemical Equilibrium Record All observations Here Studying the Dissociation ofHC

Question

Chemical Equilibrium Record All observations Here Studying the Dissociation ofHCH,oa LAsetic Asida in water Eguilibrium color of original equilibrium mixture: reddish ponk color change aftdr addition ofNaC2HJoz: Orange nge after heating mixture: yellow color change after cooling mixture: Orange Stu ing the color of original equilibrium mixture: coldr change after addition of distilled water: pin color change after addition of 12MHCl: color change after addition of distilled water: color change after heating mixture: dark blue color change after cooling mixture: Pink LIL Studying the Dissolution of NHC in Water Equilibrium initial appearance of equilibrium mixture Clear change after addition of 12M HCl ge arter heating mixture for inital-tes Clear as it appearance.

Explanation / Answer

II
8) [Co(H2O)6]2+ (aq)+ 4 Cl- (aq) <--------------> [CoCl4]2- (aq) + 6 H2O (g)
9) CoCl2. H2O
10) According to Le Chatlier's principle, When 12M HCl is added, there will be more Cl- in solution,
   so the equilibrium is shifts to the right making the solution blue.
11) When distilled water is added the equilibrium shifts towards left, favoring [Co(H2O)6]2+
     and hence it turns pink.
12) According to the equation written in 8) it is endothermic
13) [Co(H2O)6]2+ (aq)+ 4 Cl- (aq) <--------------> [CoCl4]2- (aq) + 6 H2O (g) H = +50kJ/mol

III
14) NH4Cl (s) ----------> NH4+ (aq) + Cl- (aq)

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