The book Manual of the Chemical Analysis of Rocks was written by author Henry S Henry Stephens Washington Here you can read free online of Manual of the Chemical Analysis of Rocks book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Manual of the Chemical Analysis of Rocks a good or bad book?
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Of solvent should have been used. 1 The description now applies to ordinary, crystalline precipitates. Gel- atinous ones need slightly different treatment, as will be described under silica (p. 140), and alumina (p. 152). 2 A turbidity appearing in the suction tube is but momentary and need cause no concern. It is due to neutralization of the acid by the ammonia remaining in the tube causing reprecipitation. FILTRATION AND WASHING 95 The filter is then washed four or five times, the liquid pass...ing of course, into the beaker below, and the sides of the beaker and the stirring-rod are washed down. This should all be done so that not more than 100 or 150 c. C. Of liquid and washings containing the dissolved precipitate are in the original beaker. The liquid is then warmed, a few drops of the precipitant added and reprecipitation brought about by the addition of the proper reagent. During this operation the contents of the beaker are to be stirred constantly. The beaker (covered) is set aside for some time to ensure settling and complete precipitation.
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