Write the equilibrium expression and identify the specific equilibrium constant symbol if possible, otherwise use Kc. (a) 2H2O(l) ⇌ H3O+ (aq) + OH- (aq) (b) HCN (aq) + H2O (l) ⇌ H3O+ (aq) + CN- (aq) (c) 5C2O42- (aq) + 2MnO4- (aq) + 16H+ (aq) ⇌ 10CO2 (g) + 2Mn2+ (aq) + 8H2O (l) (d) Sr(HCO3)2 (aq) ⇌ SrCO3 (s) + CO2 (aq) + H2O (l) (e) PbSO4 (s) ⇌ Pb2+ (aq) + SO42- (aq)
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Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
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Write the equilibrium expression and identify the specific equilibrium constant symbol if possible, otherwise use Kc.
(a) 2H2O(l) ⇌ H3O+ (aq) + OH- (aq)
(b) HCN (aq) + H2O (l) ⇌ H3O+ (aq) + CN- (aq)
(c) 5C2O42- (aq) + 2MnO4- (aq) + 16H+ (aq) ⇌ 10CO2 (g) + 2Mn2+ (aq) + 8H2O (l)
(d) Sr(HCO3)2 (aq) ⇌ SrCO3 (s) + CO2 (aq) + H2O (l)
(e) PbSO4 (s) ⇌ Pb2+ (aq) + SO42- (aq)
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