Lecture Demonstrations in Physical Chemistry
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In our eReader you can find the full English version of the book. Read Lecture Demonstrations in Physical Chemistry Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Lecture Demonstrations in Physical Chemistry
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P. 68.
CATALYSIS 65 sis of hydrogen peroxide by chromic acid, studied by Spitalsky. 1 The reaction is performed by carefully heating in a test-tube at 4O-5OC. 20 cc. Of a 20 per cent, solution of hydrogen peroxide (Merck's solution), to which has been added 5 cc. Of a N/ioo solution of chromic acid. The reaction starts slowly, the solution becoming blue ; after about 10 minutes a violent reaction takes place, the color of the solution changing into red-violet (induc- tion period). Finally the r...eaction slackens and comes to a stop, and the original color of the chromic acid is re- stored.
TYPE 10.
70. The part played by so-called "germs" in catalysis is illustrated by an experiment, due to Luther, 2 and de- scribed by him as follows : Some word is written, with an alum crystal, on a clean glass plate. Invisible minute crystals remains, where the crystal has been passed. On pouring a super- saturated alum solution over the glass, crystallization starts at the "germs" and the word becomes visible.
What to read after Lecture Demonstrations in Physical Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Henry Sjoerd Van Klooster to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
P. 68.
CATALYSIS 65 sis of hydrogen peroxide by chromic acid, studied by Spitalsky. 1 The reaction is performed by carefully heating in a test-tube at 4O-5OC. 20 cc. Of a 20 per cent, solution of hydrogen peroxide (Merck's solution), to which has been added 5 cc. Of a N/ioo solution of chromic acid. The reaction starts slowly, the solution becoming blue ; after about 10 minutes a violent reaction takes place, the color of the solution changing into red-violet (induc- tion period). Finally the r...eaction slackens and comes to a stop, and the original color of the chromic acid is re- stored.
TYPE 10.
70. The part played by so-called "germs" in catalysis is illustrated by an experiment, due to Luther, 2 and de- scribed by him as follows : Some word is written, with an alum crystal, on a clean glass plate. Invisible minute crystals remains, where the crystal has been passed. On pouring a super- saturated alum solution over the glass, crystallization starts at the "germs" and the word becomes visible.
What to read after Lecture Demonstrations in Physical Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Henry Sjoerd Van Klooster to read onlineMoreLess
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