Estudo de algumas reações oxoacidobásicas no solvente NaCl fundido entre 1100K e 1200K

Sérgio Luiz Koeller, Richard Louis Combes
2002 Química Nova  
Recebido em 23/11/00; aceito em 28/8/01 STUDY OF SOME OXOACIDBASIC REACTIONS IN MOLTEN NaCl IN THE TEMPERATURE RANGE OF 1100K TO 1200 K. Equilibrium constants (K) of some oxoacidbasic reactions in molten NaCl in the temperature range of 1100K to 1200K, have been measured potentiometrically with a calcia stabilized zirconia oxide ion (O 2-) indicator electrode. In molten NaCl at 1100K the pKs values (in molality scale) for HCl/H 2 O and HO -/H 2 O are respectively 11.0 ± 0.3; 1.6 ± 0.3 and the
more » ... 1.6 ± 0.3 and the pKs for CaO is 4.3 ± 0.3. The results have been compared with those determined previously by Combes for the molten equimolar NaCl-KCl mixture and are in good agreement with literature data and gives some qualitative explanation of the comparison of oxoacidbasic properties between molten NaCl and NaCl-KCl.
doi:10.1590/s0100-40422002000200010 fatcat:blewvna7endknjupboe5hc7yhm