They are precipitated from their alkaline solutions as cobalt sulphide by sulphuretted hydrogen, but this precipitation is prevented by the presence of citric and tartaric acids; similarly the presence of ammonium salts hinders their precipitation by caustic alkalis. [Please select]
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But there is something cheaper still, and that is citric acid. [Please select]
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4 parts of oil of turpentine; 42 parts acetic acid; 42 parts citric acid; 42 parts white soap. [Please select]
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As a rule, organic acids--for example acetic, oxalic, citric, tartaric--have no action on cellulose or cotton. [Please select]
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His citric-acid moods were forgotten, his harsh tempers put aside. [Please select]
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He has tried the action of such acids as citric, tartaric, oxalic, acetic, malic, and other acids, on finely powdered carbonates, silicates, sulphides, and other classes of mineral. [Please select]
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