PbBr2 LEAD BROMIDE

PbBr2 LEAD BROMIDE -392.9133 9.8716E+03 1.4928E+02 -7.7340E-02... 

PbBr2 LEAD BROMIDE 77.781 9.2048E-03 2.1995E-13 -3.1856E-16 1.6938E-19 298 640 solid... 

Both lead bromide, PbBr2, and silver bromide, AgBr, are only slightly soluble. 

PbBr2 (aq.). Thomsen15 measured the heat of solution of lead bromide. 

The external surfaces of the used catalyst, as well as the surfaces of the catalyst container, were usually covered with a grayish-white film that x-ray analysis usually indicated was an amorphous compound consisting of Br, Cl, P, Pb, and S. On occasion, this compound was identified as lead bromide phosphate, 3[Pb3(P04)2] PbBr2, 600A crystallite size. Ash and gum deposits were usually found on the upstream (inlet) end of monolithic catalysts they often caused plugging of a small fraction of the flow channels. Analysis of these deposits revealed that they consisted primarily of calcium, zinc, and phosphorus, i.e. they resulted primarily from the consumption of motor oil. 

A demonstration of the electrolysis of a molten ionic binary compound con be carried out by the teacher in a fume cupboard. Suitable compounds include lead bromide (PbBr2< melting temperature 373 °C) or lead iodide (Pblj, melting temperature 402 C). 

PbBr2, lead(II) bromide MgBr2, magnesium bromide GaBrj, gallium bromide... 

Polymer film conductivities were measured by complex AC impedance analysis, as described previously for MgCl electrolytes. Among the lead bromide electrolytes, PbBr2.(PEQ) has tne-.highest conductivity between 60 C and 200°C. It is about 10 ohm-cm) at 180°C. The variation of conductivity with temperature cycling reveals complex hystereses that surely are the result of the various dissolution and crystallization processes which occur as the temperature is changed. The lead iodide electrolytes are generally lower in conductivity compared to the bromides. 

Lead (II) bromide [10031-22-8] M 367.0, m 373°. Crystallised from water containing a few drops of HBr (25mL of water per gram PbBr2) between 100° and 0°. A neutral solution was evaporated at 110° and the crystals that separated were collected by rapid filtration at 70°, and dried at 105° (to give the monohydrate). To prepare the anhydrous bromide, the hydrate is heated for several hours at 170° and then in a Pt boat at 200° in a stream of HBr and H2. Finally fused [Clayton et al. J Chem Soc, Faraday Trans 1 76 2362 1980]. 

The enhancement of SWV net peak current caused by the reactant adsorption on the working electrode surface was utilized for detection of chloride, bromide and iodide induced adsorption of bismuth(III), cadmium(II) and lead(II) ions on mercury electrodes [236-243]. An example is shown in Fig. 3.13. The SWV net peak currents of lead(II) ions in bromide media are enhanced in the range of bromide concentrations in which the nentral complex PbBr2 is formed in the solntion [239]. If the simple electrode reaction is electrochemically reversible, the net peak cnnent is independent of the composition of supporting electrolyte. So, its enhancement is an indication that one of the complex species is adsorbed at the electrode snrface. 

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