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" Add 50 cc of 50 per cent sulphuric acid (by volume), and to the cold undiluted solution add from a weighing bottle a moderate excess of the ferrous ammonium sulphate, and titrate back with the dilute bichromate (B). "
The Examination of Hydrocarbon Oils and of Saponifiable Fats and Waxes - Page 395
by David Holde - 1915 - 483 pages
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Methods of Organic Analysis

Henry Clapp Sherman - Analytical chemistry - 1912 - 442 pages
...with the dilute dichromate (.??). Calculate the value of the ferrous salt in terms of dichromate. (Z>) Silver carbonate. — This is prepared as required...sulphate solution by precipitation with about 4.9 cc. normal sodium carbonate solution (a little less than the calculated quantity of sodium carbonate should...
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Fatty Foods, Their Practical Examination: A Handbook for the Use of ...

Edward Richards Bolton, Cecil Revis - Food - 1913 - 474 pages
...of potassium bichromate (A) in 50 cc of water. Add 50 cc of 50 per cent. (by volume) sulphuric acid, and to the cold undiluted solution add from a weighing...prepared as required for each test from 140 cc of 0-5 per cent. silver sulphate solution by precipitation with about 4-9 cc N/l sodium carbonate solution...
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Allen's Commercial Organic Analysis: A Treatise on the Properties ..., Volume 9

Alfred Henry Allen - Chemistry, Analytic - 1917 - 904 pages
...back with the dilute dichromate (6). Calculate the value of the ferrous salt in terms of dichromate. (d) Silver Carbonate. — This is prepared as required for each test from 140 cc of 0.5% silver sulphate solution by precipitation with about 4.9 cc N/i sodium carbonate solution (a little...
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Allen's Commercial organic analysis v. 9, 1917, Volume 9

Alfred Henry Allen - 1917 - 864 pages
...back with the dilute dichromate (4). Calculate the value of the ferrous salt in terms of dichromate. (d) Silver Carbonate. — This is prepared as required for each test from 140 c,c. of 0.5% silver sulphate solution by precipitation with about 4.9 cc N/i sodium carbonate solution (a little...
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Commercial Organic Analysis, Volume 9

Alfred Henry Allen - 1917 - 864 pages
...back with the dilute dichromate (b). Calculate the value of the ferrous salt in terms of dichromate. (d) Silver Carbonate. — This is prepared as required for each test from 140 cc of 0.5% silver sulphate solution by precipitation with about 4.9 cc N/i sodium carbonate solution (a little...
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Aids in the Commercial Analysis of Oils, Fats, and Their Commercial Products ...

George Fenwick Pickering - Oils and fats - 1917 - 160 pages
...with the dilute dichromate (B) ; calculate the value of the ferrous sulphate in terms of dichromate. D. Silver carbonate. This is prepared as required for each test from 140 cc of 0-5 per cent. silver sulphate solution by precipitation with about 4-9 cc N/l sodium carbonate solution...
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Methods of Organic Analysis

Henry Clapp Sherman - Analytical chemistry - 1919 - 440 pages
...with the dilute dichromate (.B). Calculate the value of the ferrous salt in terms of dichromate. (Z>) Silver carbonate. — This is prepared as required...sulphate solution by precipitation with about 4.9 cc. normal sodium carbonate solution (a little less than the calculated quantity of sodium carbonate should...
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Technical Handbook of Oils, Fats and Waxes, Volume 2

Percival John Fryer, Frank Edwin Weston - Oils and fats - 1920 - 344 pages
...the dilute dichromate (B). Calculate the value of the ferrous salt in terms of dichromate. D. S1LVER CARBONATE. This is prepared as required for each test from 140 cc of o-5 per cent. silver sulphate solution by precipitation with about 4/9 cc N/i sodium carbonate solution...
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Technical Methods of Analysis as Employed in the Laboratories of Arthur D ...

Roger Castle Griffin - Analytical chemistry - 1921 - 696 pages
...cold undiluted solution add from a weighing bottle a moderate excess of the ferrous ammonium sulfate, and titrate back with the dilute bichromate (B). Calculate...value of the ferrous salt in terms of bichromate. be used as an excess prevents rapid settling). Let settle, pour off the liquid and wash once by decantation....
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Soap-making Manual: A Practical Handbook on the Raw Materials, Their ...

Edgar George Thomssen - Soap - 1922 - 266 pages
...acetin and bichromate results on such distillates. The spread multiplied by 1.736 will give the glycol. BICHROMATE PROCESS FOR GLYCEROL DETERMINATION. REAGENTS...sulphate solution by precipitation, with about 4.9 cc. AT/1 sodium carbonate solution (a little less than the calculated quantity of N/l sodium carbonate...
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