Ion and solvent transference nos. for aq. RbBr, RbI and NH4I solns. were detd. at molalities up to 5.5, 6.5 and 7.5 mol/kg, resp., from emf. measurements on appropriate transference cells. For the minimization of liq. junction potentials, all the 3 salts above are better salt bridges than the popular satd.-KCl, both because they are more nearly equitransferent (over the whole molality range) and because they can reach satn. molalities (7.01, 7.38 and 12.69 mol/kg, resp., at 25°) much higher than that of KCl (4.804 mol/kg). Therefore, concd. RbBr, RbI and NH4I solns. can be recommended as advantageous salt bridges for replacement of KCl.
A study of the equitransference level of concentrated aqueous rubidium bromide, rubidium iodide and ammonium iodide and their characterization as ultra-concentrated salt bridges for the minimization of liquid junction potentials / P.R. Mussini, S. Rondinini, A. Cipolli, R. Manenti, M. Mauretti. - In: BERICHTE DER BUNSEN-GESELLSCHAFT. - ISSN 0940-483X. - 97:8(1993), pp. 1034-1037. [10.1002/bbpc.19930970812]
A study of the equitransference level of concentrated aqueous rubidium bromide, rubidium iodide and ammonium iodide and their characterization as ultra-concentrated salt bridges for the minimization of liquid junction potentials
P.R. MussiniPrimo
;S. RondininiSecondo
;
1993
Abstract
Ion and solvent transference nos. for aq. RbBr, RbI and NH4I solns. were detd. at molalities up to 5.5, 6.5 and 7.5 mol/kg, resp., from emf. measurements on appropriate transference cells. For the minimization of liq. junction potentials, all the 3 salts above are better salt bridges than the popular satd.-KCl, both because they are more nearly equitransferent (over the whole molality range) and because they can reach satn. molalities (7.01, 7.38 and 12.69 mol/kg, resp., at 25°) much higher than that of KCl (4.804 mol/kg). Therefore, concd. RbBr, RbI and NH4I solns. can be recommended as advantageous salt bridges for replacement of KCl.Pubblicazioni consigliate
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