Lithium thiocyanate solution concentrated

IQ. To determine the concentration of chloride ion, - a 5-mL aliquot of the methyl lithium solution is cautiously added to 25 ml of water and the resulting solution is acidified with concentrated sulfuric acid and then treated with 2-3 ml of ferric ammonium sulfate [Fe(NH4)( 04)2 12 H2O] indicator solution and 2-3 ml of benzyl alcohol. The resulting mixture is treated with 10.0 mL of standard aqueous 0.100 M silver nitrate solution and then titrated with standard aqueous 0.100 H potassium thiocyanate solution to a brownish-red endpoint. 

Another type of dissolution reagents is represented by concentrated chaotropic salt solutions like hthium bromide (LiBr) (Ambrose et al., 1951), lithium thiocyanate (LiSCN) (Sridhara et al., 1973), calcium chloride (CaCl2) (Ajisawa, 1998) based on either only water or alcohol—aqueous solutions such as CaCb—ethanol—H2O (Ajisawa, 1998 Chen et al.,... 

Silver nitrate forms double salts with the halides, cyanide, and thiocyanate of silver.5 It also yields with silver sulphide a compound containing equimolecular proportions of the two salts, prepared as a yellowish-green precipitate by the action of hydrogen sulphide on a concentrated solution of silver nitrate. It forms other double salts with the nitrates of lithium and sodium,8 potassium,7 ammonium,8 and thallium.9 The solution of silver nitrate in ammonium hydroxide yields rhombic prisms, AgN03,2NH3, isomorphous with silver nitrate.10... 

Chitin is a white, amorphous solid, insoluble in water, dilute acids, dilute and concentrated alkali, and organic solvents. It readily dissolves in concentrated hydrochloric, sulfuric, nitric, and phosphoric acids, in anhydrous formic acid, with difficulty in liquid ammonia, but not in Schweizer s reagent. Hot, concentrated solutions of neutral salts, like lithium and calcium thiocyanate, dissolve chitin, which can then be reprecipitated by dilution with alcohol or acetone, without apparent degradation. 

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