1) A Lewis base is defined as... a) ...a proton acceptor b) ...an electron pair donor 2) Which of the following can act as a Lewis acid? a) CH3COOH b) HCl c) Fe2+ d) H2SO4 3) When iron (II) sulfate is dissolved in water, the complex ion that forms is... a) [Fe(H2O)6]2+ b) [Fe(SO4)6]2+ c) FeSO4(aq) 4) What is the name for converting anhydrous metal salts into metal aqua ions? a) Hydrogenation b) Hydration c) Condensation 5) Which of these transition metals can have the largest oxidation number? a) Manganese (Mn) b) Chromium (Cr) c) Iron (Fe) d) Zinc (Zn) 6) What is the shape of metal hexaqua complex ions? a) linear b) tetrahedral c) square planar d) octahedral 7) Which of these two complex ions will have the lowest pH? a) [Fe(H2O)6]2+ b) [Fe(H2O)6]3+ 8) What property of the transition metal ion has the biggest influence on the pH of the aqua ion solution? a) size b) colour c) charge density d) charge 9) Which of these chemicals is a good oxidising agent? a) Zinc b) Hydrogen peroxide c) Carbon monoxide d) Nitrogen 10) In a hexaqua complex ion an O-H bond is broken and H3O+ forms (making the solution acidic). This process is called... a) Hydrolysis b) Condensation c) Acidity d) Decomposition 11) Which of these equations shows the equilibrium present in iron (II) sulfate solution? a) [Fe(H2O)6]2+ +OH- --> [Fe(H2O)5(OH)]+ + H2O b) [Fe(H2O)6]2+ +H2O --> [Fe(H2O)5(OH)]+ + H3O+ 12) What word defines the following 3 chemicals: NaOH, NH3, Na2CO3? a) solid b) metal salt c) base d) lewis acid 13) What type of reaction occurs when aqueous metal complexes are reacted with small quantities of NaOH and NH3? a) precipitation b) condensation c) hydrolysis 14) Which of these is the formula of the iron containing product when [Fe(H2O)6]3+ reacts with an excess of NaOH? a) Fe(OH)2 b) Fe(H2O)4(OH)2 c) Fe(OH)3 d) [Fe(H2O)6(OH)]2+ 15) What is the colour of the precipitate Fe(OH)2? a) Green b) Pink c) Orange d) Blue 16) Why does the coloured precipitate observed for Fe(OH)2 change if you leave the test tube for 2 minutes? a) It changes back to [Fe(H2O)6]2+ b) The iron is reduced to Fe+ c) The iron is oxidised to Fe3+ 17) Which of these metal ions forms a preipitate that will dissolve in excess NaOH? a) Fe2+ b) Fe3+ c) Cr3+ d) Co2+ 18) Aluminium hydroxide, Al(OH)3(s) is a white precipitate. It is [Al(H2O)6]3+, a colourless solution, in acidic conditions and [Al(OH)4]- in alkaline conditions. We say it is... a) an acid b) an oxidising agent c) reactive d) amphoteric e) neutral 19) What is the colour of the precipitate formed when both NaOH and NH3 are reacted with [Fe(H2O)6]3+? a) green b) pink c) brown d) blue 20) The colour of [Co(H2O)6]2+? a) Yellow b) Pink c) Blue 21) When sodium carbonate is added to Fe2+ solution, what is the formula of the green precipitate formed? a) Fe(OH)2 b) FeCO3 22) What is the formula of the brown precipitate formed when Fe3+ solution reacts with sodium carbonate? a) Fe(OH)3 b) Fe2(CO3)3 23) Which of the following shows then wrong precipitate colour? a) Co(OH)2 = pink b) Cu(OH)2 = pale blue c) Fe(OH)2 = green d) Fe(OH)3 = brown 24) What is the formula for the complex ion formed when excess NH3 is added to Cu(OH)2 precipitate? a) [Cu(NH3)6]2+ b) [Cu(H2O)4(NH3)2]2+ c) [Cu(H2O)6]2+ 25) What two observations would you make when sodium carbonate is added to Cr3+ solution a) Temperature drop and a green precipitate b) Fizzing and a blue precipitate c) Fizzing and a green precipitate 26) What is the name for the type of reaction shown here? [FeCl4]2- + 4KI --> [FeI4]2- + 4KCl a) Condensation b) Precipitation c) Ligand substitution 27) Why does Cl- cause a change of coordination number here? [Cu(H2O)6]2+ + 4Cl- --> [CuCl4]2- + 6H2O a) it is negatively charged b) it is large c) it is unidentate 28) What word defines EDTA4- as a ligand a) bidentate b) chelating c) pentadentate 29) Why is this reaction likely to occur spontaneously? [Cu(H2O)6]2+ + 3C2O4^2- --> [Cu(C2O4)3]4- + 6H2O a) It involves charged ions b) There is an entropy increase c) C2O4^2- is a bidentate ligand 30) If there is a large Ka for this equilibrium, which complex ion is more stable? [Fe(H2O)6]3+ + 4Cl- --> [FeCl4]- + 6H2O a) [Fe(H2O)6]3+ b) [FeCl4]-

Inorganic aqueous solutions quiz

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