Zinc Bromide Supplier and Manufacturer
ZINC BROMIDE
PHYSICAL AND CHEMICAL PROPERTIES |
Property | Cesium Formate18,19, solution | Zinc Bromide20, solution | Zinc Bromide21, solution |
CAS number | 3495-36-1 | 7699-45-8 | 7699-45-8 |
Chemical Formula | CsCOOH | ZnBr2 | ZnBr2 |
Chemical Structure | HCOO-Cs+ | Zn2+Br22- | Zn2+Br22- |
Molecular weight | 177.92 | NA | 225.18 |
Appearance | Colorless liquid | Clear liquid | Clear liquid |
Boiling point | 141 °C (at 2.3 sg) | 136 °C (at 760 mmHg) | 136 °C |
pH | 10-11 (10:1 dilution) | 0.5 - 1.5 | 5-7 |
Viscosity | 4.80 cp (at 25 °C) | NA | 31 cp (at 15 °C) |
Solubility in water | Powder :1906 gl-1 (at 20°C)22 Solution is completely miscible with water. | Completely with water. miscible with solvents. | NA |
Dissociation constant (pKa) | 3.76 | NA | NA |
Vapour Pressure | 466 Pa (at 20 °C) | 5.2 mmHg (at 25°C) ≈ 693 Pa | NA |
Density -Specific gravity -Pounds per Gallon | 2.3 (at 15.6 °C) 19.2 (at 15.6 °C) | 2.30 (at 20 °C) | 19.2 |
Friction coefficient | 0.166 (metal-to-metal, at 200 o F, 2.2. sg) 0.151 (metal-to-sandstone, at 200oF, 2.2. sg) | NA | NA |
Thermal conductivity | 0.00059 (at 21.1 °C, 2.2 sg) 0.00057 (at 82.2 °C, 2.2 sg) | NA | NA |
SPECIATION, BEHAVIOR AND MOBILITY IN SEAWATER
3.2.1 The process
Chemical speciation describes the chemical form in which the substance exists. Speciation in turn influences the behavior and mobility of the substance and in fact these are all interdependent properties of substances. These properties largely determine the fate and effects of a substance in the environment.
3.2.2 CESIUM FORMATE
3.2 Speciation, behavior and mobility in seawater
3.2.1 The process
Chemical speciation describes the chemical form in which the substance exists. Speciation in turn influences the behavior and mobility of the substance and in fact these are all interdependent properties of substances. These properties largely determine the fate and effects of a substance in the environment.
3.2.2 Cesium formate
In sea water cesium formate dissociates into its ionic constituents Cs+ and HCOO-. Cesium is a natural component of seawater and its average concentration is approximately 0.3 Ig/l. Alkali metals exist as hydrated ions in aqueous solutions. For the cesium ion, the arrangement of water molecules around the cation is probably octahedral23. A very small proportion (max 1 %) of the cesium in seawater exists as ion paired with sulphate (CsSO4-)24. In sea water, the formate anion may form weak association complexes with cautions. In an aqueous solution a very small proportion of the formate ions will react with water molecules and formic acid will be formed.
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