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Question 19Not yetansweredMarked out of5.00FlagquestionChoose the true statements about rates of ligand exchange of metal aquacomplexes, as measured by the rate of H2O ligand exchange with isotopicallylabeled water (H2^18O). Wrong answers score a small penalty, so take care.Select one or more:a. The rates of exchange for all of the alkali metal ions are high, but not thesame, with Li^+, for instance, exchanging more slowly than Cs^+.b. Be^2+ exchanges more slowly than Al^3+.c. Cr^3+ has an unusually low rate of exchange.d. The exchange rate for Cr^2+ is only slightly higher than that of Cr^3+.e. All of the trivalent metal cations (M^3+) have approximately the same rateof exchange due to their similar charge densities.f. Metal ions of the second and third transition series exhibit high rates ofexchange due to their larger ionic radii compared with the metal ions ofthe first transition series.