Laboratory Notes in Household Chemistry for the Use of Students in Domestic Sci

Hermann T Hermann Theodore Vult

The book Laboratory Notes in Household Chemistry for the Use of Students in Domestic Sci was written by author Hermann T Hermann Theodore Vult Here you can read free online of Laboratory Notes in Household Chemistry for the Use of Students in Domestic Sci book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Laboratory Notes in Household Chemistry for the Use of Students in Domestic Sci a good or bad book?

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Unravelled threads of linen fabric are untwisted and broken by holding between the thumbs and index fingers and pulled apart slowly and steadily. Linen parts slowly, and with point- ed ends.
Burn a piece of linen fabric and note the condition of the fiber ends.
(c) Solubility in Concentrated Sulphuric Acid. Treat a piece of linen cloth with concentrated sulphuric acid and compare the effect with the effect on cotton cloth.
TESTS ON HGNOCELLULOSE (a) Structure. Examine carefully the character of... the fibers.
(&) Phloroglucinol Test. Phloroglucinol, in HC1, gives a deep magenta coloration with any of the ligno- celluloses.
The reagent is prepared by dissolving the phenol to saturation in HC1 (1. 06 sp. Gr. ).
(c) Saturate moist jute fiber, held in a glass tube, with chlorine gas and then pass SO 2 through it. Note the characteristic reaction a deep magenta color.
TESTS ON PAPER Determine starch as filler with iodine solution. De- FOOD PRINCIPLES III termine "size" with Millon's reagent. If protein material is present a white precipitate, turning red on heating forms.

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