250 QUANTITATIVE ANALYSIS. 



Barium Carbonate, precipitated from barium chloride solu- 

 tion by ammonium carbonate and well washed. 



Barium Chloride, 1 : 10. 



Barium Nitrate, 1 : 12. 



Baryta-water. One part of crystallized caustic baryta heated 

 with fifteen parts of water and, after cooling, filtered. 



Basic Lead Acetate. Lead subacetate solution, commercial. 

 (Liquor Plumbi Acetici Ph. G. IV.) 



Bromine-water. Water shaken with an excess of bromine 

 and allowed to stand till the bromine has settled. 



Briicke's Reagent (potassium mercuric iodide solution). 

 Heat a solution of potassium iodide containing 100 g. of 

 KI in the liter, and add mercuric iodide as long as it dis- 

 solves. After cooling decant from the red crystals and 

 add a few crystals of potassium iodide. 



Calcium Chloride. Dry pure calcium chloride, 1 : 10. 



Cochineal Tincture. Five grams of cochineal, 150 cc. of 

 alcohol, and 100 cc. of water are allowed to stand for 

 some days at room temperature; the solution is then 

 poured off and filtered. The cochineal remaining may 

 be used over again. 



Copper Sulphate, 1 : 10. 



Ether. Must leave, on evaporation, no residue having an 

 odor or an acid reaction. 



Ferric Chloride, 3 : 100. 



Hydrochloric Acid, specific gravity 1.183. 



Lead Acetate, 1 : 10. 



Magnesia Mixture. One part of crystallized magnesium sul- 

 phate, two parts of ammonium chloride, four parts of 

 ammonia, and eight of water, or 110 g. of magnesium 

 chloride (chemically pure), 140 g. of ammonium chloride, 

 700 cc. of 8 per cent, ammonia, and 1300 parts of water 

 (or 250 cc. of ammonia, specific gravity 0.91, and 1750 cc. 

 of water). Let stand for some days before using. 



