Solubility of Rubidium Nitrate in CH₃OH or C₂H₅OH Aqueous Solutions at Different Temperatures

Abstract

The solubilities of rubidium nitrate in water, water plus methanol, and water plus ethanol have been determined using a simple accurate analytical method at different temperatures. In all cases, the presence of either methanol or ethanol significantly reduced the solubility of rubidium nitrate in aqueous solution. A four-parameter equation was adjusted to the experimental data satisfactorily. Refractive index was also determined for the two ternary systems both in saturated and unsaturated solutions with varied salt concentrations. Furthermore the values for refractive index were correlated with the proportions of alcohol and the concentrations of salt.

Frustrated Coulombic and Cation Size Effects on Nanoscale Boehmite Aggregation: A Tumbler Small- and Ultra-Small-Angle Neutron Scattering Study

“…M 1+ nitrate solubilities. Yellow squares, LiNO 3 ; green circles, NaNO 3 ; blue and gray diamonds, KNO 3 ; purple and pink triangles, RbNO 3 ; black filled squares, CsNO 3 ; orange square, CsNO 3 ; and red squares, CsNO 3 …”

“…To understand the origins of the high-salt effects, it is useful to first consider the nature of the fluid in the absence of boehmite. Figure 14 shows the solubilities of LiNO 3 , 110 NaNO 3 , 111 KNO 3 , 112,113 RbNO 3 , 114,115 and CsNO 3 . 116−118 At 25 °C, the solubility of KNO 3 is again out of sequence with respect to the other M 1+ nitrates, implying that the reoccurrence of this pattern in our data may, at least in part, be a function of the structure of aqueous KNO 3 .…”

Solubilities, Densities and Refractive Indices of Rubidium Chloride or Cesium Chloride in Ethanol Aqueous Solutions at Different Temperatures

“…1 Studies are available in the literature on solubilities of various salts in water plus organic solvents, the objectives of which have been to evaluate the potential applicability of the drowning-out procedure as a technique for separation of these salts. [2][3][4][5][6][7][8][9] As far as we know, there is no report on the solubility data of the RbCl-C 2 H 5 OH-H 2 O and CsCl-C 2 H 5 OH-H 2 O ternary systems at 25 and 35 ℃, which are of interest in the design of purification methods for rubidium chloride and cesium chloride. In this study, solubility, density and refractive index data have been measured for the two ternary systems at 25 and 35 ℃.…”

Solubilities of Sodium, Potassium, and Copper(II) Sulfates in Ethanol−Water Solutions

“…The experimental values for solubility (molality) of the ternary systems may be correlated as a function of the salt-free mass fractions for each temperature, according to the equation ln false( m false) = ln false( m 0 false) + ∑ i = 1 P A i w normale i where m is the molality of the saturated solution; w e is the ethanol mass fraction of the salt-free solution; A i are adjustable parameters, which are given in Table ; P is the number of terms in the polymonial; and m 0 is the molality of the saturated salt + water binary system.…”

“…In the case of the decahydrated sodium sulfate salt, due to its lower solubility, it could not be reached at the temperatures of this work. The experimental values for solubility (molality) of the ternary systems may be correlated as a function of the salt-free mass fractions for each temperature, according to the equation 16 lnðmÞ…”