Standards And Tests for Reagent Chemicals
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0000% Chlorides (Cl) 0. 0050% Acid-insoluble Matter 0. 0500% Substances not Precipitated by Hydrogen, Sulphide. 0. 2500% Water-soluble Substances 0. 0167% Sulphates (SO 3 ) 0. 0400% Calcium (Ca) 0. 0013% Methods of Testing Nitrates and Carbonates. Heat 100 gm. Of copper oxide in a glass tube, pass over it a stream of moist air, freed from carbon dioxide, and test the vapors with moist blue litmus paper and also by passing them into lime water. The paper should not be reddened and the lime water... should not be rendered turbid.
Chlorides. Dissolve 1 gm. In a mixture of 10 mils of nitric acid and 10 mils of water, and add silver nitrate solu- tion. The solution should not become cloudy.
Acid-insoluble Matter and Substances not Precipi- tated by Hydrogen Sulphide (Iron, etc. ). Dissolve 2 gm. In 10 mils of hydrochloric acid, dilute with 100 mils of water and collect and weigh any insoluble matter. The weight should not exceed 0. 001 gm. Heat the solution to COPPER OXIDE, POWDER 151 about 70 C.
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To quickly assess the difficulty of the text, read a short excerpt:
0000% Chlorides (Cl) 0. 0050% Acid-insoluble Matter 0. 0500% Substances not Precipitated by Hydrogen, Sulphide. 0. 2500% Water-soluble Substances 0. 0167% Sulphates (SO 3 ) 0. 0400% Calcium (Ca) 0. 0013% Methods of Testing Nitrates and Carbonates. Heat 100 gm. Of copper oxide in a glass tube, pass over it a stream of moist air, freed from carbon dioxide, and test the vapors with moist blue litmus paper and also by passing them into lime water. The paper should not be reddened and the lime water... should not be rendered turbid.
Chlorides. Dissolve 1 gm. In a mixture of 10 mils of nitric acid and 10 mils of water, and add silver nitrate solu- tion. The solution should not become cloudy.
Acid-insoluble Matter and Substances not Precipi- tated by Hydrogen Sulphide (Iron, etc. ). Dissolve 2 gm. In 10 mils of hydrochloric acid, dilute with 100 mils of water and collect and weigh any insoluble matter. The weight should not exceed 0. 001 gm. Heat the solution to COPPER OXIDE, POWDER 151 about 70 C.
What to read after Standards And Tests for Reagent Chemicals?
You can find similar books in the "Read Also" column, or choose other free books by Benjamin Lindley Murray to read onlineMoreLess
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