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Answers:I can see why you got all these wrong. The correct expressions would be 1) CaCl2 Ca2+ + 2Cl- Since there are 2 Cl atoms in CaCl2, therefore, dissociation of CaCl2 in water will produce 2 Cl- (chloride ions) in solution, which you haven't considered. 2) NH4)2SO4 2NH4+ + SO4 2- The valency of sullphate (SO4 2-) anion is 2 and not 1. 3) N2C2H3O2 is sodium acetate, and can be written as CH3COONa. CH3COONa Na+ + CH3COO- This one was correct.
Answers:NaOH = Na+ + OH- HCl + H2O = H3O+ + Cl H2SO4 + H2O = H3O+ + HSO4- Mg(OH)2 = Mg2+ + 2 OH- H3PO4 + H2O = H3O+ + H2PO4- H2PO4- + H2O = H3O+ + HPO42- HPO42- + H2O = H3O+ + PO43-
Answers:H2SO4 + H2O >> HSO4- + H3O+ HSO4- + H2O >> SO42- + H3O+ H2SO4 + 2 H2O >> SO42- + 2 H3O+
Answers:using hydrochloric acid as an e.g. HCl (aq) ---> H+(aq) + Cl- (aq) the H+ are fully dissociated into the solution suggesting it's a strong acid.