β Scribed by H.C. Gaur; R.S. Sethi
No coin nor oath required. For personal study only.
titrations of dilute solutions of silver nitrate in molten KNO,-Ba(NO,), with potassium halides have b+n carried out. The solubility products of AgCl, A d solvent at 350" were found to be. ( 7.91 f O-35) x 1O-s, (4023 f O-23) x lo+ an Br and AgI in this (l-964 f O-39) x IO-(mole/l000 g)* respectively. Heats and free energies of solution for the above halides were 19*15,24*05,32*83 & 0.5 and 16*96,20*65,27*25 f 2.5 Kcal/mole respectively; these have also been estimated from available thermal and thermodynamic data by the application of the FFG cycle. The agreement between experimental and the estimated values is fairly good. This shows the potentiality of such calculations in making predictions, a priori, of the above parameters in reciprocal molten salt systems of the type Ag+, K+, Ba*+/X-, NOI-. Rti&Titrages potentiom&riques de solutions dil&.s de nitrate d'argent dans KNO,-Ba(NO,), fondus, au moyen d'halog&res de potassium. Les produits de solubilit6 de AgCl, AgBr et AgI dans ce solvant sent (7,91 f 0,35) x lo+, (4,023 f 0,23) x 10-O et (1,964 f 0,39) x enthalpies et enthalpies libres de solution des halo@mues ci-dessus ant &6 respe&ivement 19,15, 24,05, 32,83 & 0,5 et 16,96, 20,65, 27,25 f 2,s K&/mole; elles peuvent aussi &re suppu&s au moyen de don&es thermiques et thermodynamiques appropri&, par application d'un cycle FFG. L'accord entre les valeurs expt%mentales et celles ainsi calculQs est B peu p&s bon. D'oh l'int&i% de tels calculs pour prkvoir a priori les param&res ci-dessus, pour des syst&mes de sels fondus r&ciproques de type Ag+, K+, Ba*+/X-, NO,-. Z-WVerdiinnte Lasungen von Silbemitrat in geschmolzenem KNO*-Ba(NO,)( wurden mit Kaliumhalogeniden potentiometrisch titriert. Man bestimmte die Laslichkeitsprodukte von AgCl, AgBr und AgI in diesen Lijsungen bei 350Β°C zu (7,91 f 0,35) x lO_lO, (4,023 f 0,23) x 10-O und (1,964 f 0,39) x 1O-s (Mol/lOOO g)*. Die L&ungsw&men und die freien Lissungsenthalpien dererw&hntenHalogenidebetrugen19,15,24,05,32,83 f 0,5und16,96,20,65,27,25 f 2,5 kcal/Mol. Diese Werte wurden gleichzeitig aus vorhandenen kalorischen und thermodynamischen Da&n mit Hilfe des FFG-Kreiiprozesses abgeschsltzt. Experimentelle und abgesch&te Werte stimmen ziemlich gut i&rein.
Dies zeigt, dass aufgrund solcher Berechmmgen Voraussagen ilber die erwilhnten Parameter von Schmelzen der reziproken Salzsysteme vom Typ Ag+, K+, Ba*+/X-, NOs-gemacht werden kiinnen.
π SIMILAR VOLUMES
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