Iron ammonium alum nitrate

Introduce the benzoic acid residue as the sodium salt into a boiling-tube and heat in a beaker of boiling brine until the liquid is driven off and all drops of condensation water have disappeared. Cool, add 0 1 g of potassium nitrate and 1 ml of concentrated sulphuric acid. Place the tube in boiling water for twenty minutes. Cool and add 2 ml of water. Hold the tube under running water and add carefully 10 ml of 15 per cent ammonia solution followed by 2 ml of a 2 per cent hydroxylamine hydrochloride solution. Mix well and place in a beaker of water at 65° for five to six minutes. Cool and match the colour with that developed by mixing the amounts of iron ammonium alum and potassium thiocyanate solution given below for varying quantities of benzoic acid. 

There are a number of mineral and metallic salts which have a long association with the alchemical art. The fifteenth century alchemist, Isaac Holland describes The Hand of the Philosophers as being an assembly of important salts in alchemical works. These salts include Niter (potassium nitrate), Sal Ammoniac (ammonium chloride), Vitriol (copper or iron sulfate), Alum (potassium aluminum sulfate), and common salt (sodium chloride). 

Aminoethanol 2-Aminoisobutyric Acid Ammonia Ammonia Solution Ammonium Ammonium Acetate Ammonium Alum Ammonium Bicarbonate Ammonium Bichromate Ammonium Bifluoride Ammonium Bromide Ammonium Carbonate Ammonium Chloride Ammonium Dichromate Ammonium Fluoride Ammonium Glycolate Ammonium Hydrogen Carbonate Ammonium Hydrogen Fluoride Ammonium Hydrosulfide Ammonium Hydroxide Ammonium Hyposulfite Ammonium Iron Sulfate Ammonium Molybdate Ammonium m-Phosphate Ammonium Nitrate Ammonium o-Phosphate Ammonium Oxalate Ammonium Peroxydisulfate Ammonium Persulfate Ammonium Phosphate Ammonium Phosphate Dibasic Ammonium Rhodanide Ammonium Sulfamate Ammonium Sulfate Ammonium Sulfide Ammonium Thiocyanate Ammonium Thioglycolate Ammonium Thiosulfate... 

Chemical properties of iron. Passivity. Ferrous compounds ferrous sulfate, ferrous ammonium sulfate, ferrous chloride, ferrous hydroxide, ferrous sulfide, ferrous carbonate. Ferric compounds ferric nitrate, ferric, sulfate, iron alum, ferric chloride, ferric hydroxide, ferric oxide (rouge, Venetian red). Potassium ferro-cyanide, potassium ferricyanide, Prussian blue. 

Huber and Van der Wielen determine the volatile oil (thiocyanate) in mustard seeds as follows. Their experiments were directed towards determining to what extent the time of maceration of the crushed seeds in water influences the result. Five gram samples of the mustard were macerated for 1, 2, 4, 18, and 20 hours respectively, with 100 c.c. of water, after which were added 20 c.c. of alcohol and 2 c.c. of olive oil. Of the mixture about 50 c.c. were distilled into a 100 c.c. measure containing 10 c.c. of ammonia, taking care that the delivery tube was immersed in the ammonia. After adding 20 c.c. of deci-normal silver nitrate solution the whole was heated over a water-bath until the silver sulphide had aggregated and the liquid was clear. The liquid was then cooled and made up with water to 100 c.c., the excess of silver nitrate was determined by titration with deci-normal ammonium thiocyanate, usW iron alum as an indicator. 

Boil about 10 g, accurately weighed, under reflux with 20 ml of 5 per cent ethanolic solution of sodium hydroxide for thirty minutes. Add 100 ml of water, acidify with dilute nitric acid and add 10 ml of O IN silver nitrate. Shake vigorously, filter, wash and titrate with 0-02N ammonium thiocyanate using iron alum as indicator. 1 ml 0 1 N AgN03 = 0 03545 g CijHyCl,. 

Dissolve about 4 g in sufficient 95 per cent ethanol to produce 100 ml. To 5 ml of this solution add 50 ml of 0 1 N silver nitrate and 5 ml of strong ammonia solution heat under a reflux condenser on a water-bath for thirty minutes, cool, dilute to exactly 100 ml with water and filter. To 50 ml of the filtrate add 5 ml of concentrated nitric acid, and titrate the excess of silver nitrate with 0 1 N ammonium thiocyanate, using iron alum as indicator. 1 ml 0 1 N = 0 004958 g C3H5NCS. 

A number of dilute chemical solutions attack tin metal slowly, with consequent corrosion. Among these are aluminium chloride, aluminium potassium alum, ammonium sulphate, hydrochloric acid, hydrobromic acid, hydriodic acid, fluorine, chlorine, bromine, iodine, iron(III) chloride, potassium carbonate, potassium hydroxide, silver nitrate, zinc chloride, glycerol and maleic acid. ... 

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