Chemistry UNIT 5 Inorganic reactions 0.0 / 5 ? ChemistryReactionsAcids, bases and saltsA2/A-levelAQA Created by: JessAnnBCreated on: 03-04-16 11:50 What is a Lewis acid? An electron pair acceptor. 1 of 12 What is a lewis base? An electron pair donor. 2 of 12 What is formed when transition metal salts dissolve in water? Aqua ion complexes. 3 of 12 In aqueous solutions do the metal ions act as lewis acids or bases? Lewis acid because they accept electron pairs from the water molecules. 4 of 12 What is the general equation for when [M(H2O)6]2+ reacts with water? [M(H2O)6]+2 + H2O ------> [M(H2O)5OH] + H3O+. 5 of 12 Why do the water ligands act as Lewis bases? Each H2O ligand donates a lone pair of electrons to the ion, forming a coordinate bond. 6 of 12 Why are M3+ ions more acidic than M2+? Smaller, highly charged ions exert a greater polarising effect on the water ligands, so that more O-H bonds break, releasing H+ ions. 7 of 12 What is the product formed when a base is added to a solution of transition metal aqua ions and what properties does it have? The final product is an uncharged, insoluble metal hydroxide that forms a precipitate. 8 of 12 Which complexes will a further reaction happen to if excess ammonia is added? Co2+, Cu2+ and Cr3+ complexes. 9 of 12 What is formed when sodium carbonate reacts with M3+ aqua ions? A hydrated metal hydroxide, bubbles of carbon dioxide and water. 10 of 12 What is formed when sodium carbonate reacts with M2+ aqua ions? An insoluble metal carbonate and water. 11 of 12 What is it called when a metal hydroxide can react as both an acid and a base? Amphoteric. 12 of 12
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