The Bacteriological Examination of Water-Supplies
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In our eReader you can find the full English version of the book. Read The Bacteriological Examination of Water-Supplies 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 The Bacteriological Examination of Water-Supplies
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Then the calculated amount of alkali, less this deduction, is added, and a + ro per cent, reaction is obtained. In other words, alkali is added insufficient to quite neutralize the medium (phenolphthalein neutral point), and the addition of 1*0 per cent, of £ alkali would still be required to make it completely neutral.
As an example of an actual standardization, the follow- ing is given : Two separate 10 c.c. of a i litre of nutrient broth each required the addition of 1*3 c.c. -^ sodium hydra...te solution to make them neutral to phenolphthalein. Therefore, 980 c.c. (i.e,j 1,000 - 20 c.c.) will require ( l -^ x 980^ = \ 10 / 127*4 c.c. tu sodium hydrate solution. This is equal to 1274 (^>~p)cc of g alkali.
One c.c. of £ acid is deducted for each 100 c.c, or 10 c.c.
for the litre. Therefore, 274 (1274-10) c.c. £ alkali is added to the medium, and a + i'o reaction is obtained.
If the medium is already alkaline to phenolphthalein, the sample removed for titration should be made acid by the addition of a definite and accurately pipetted amount of ^j H 2 S0 4 .
What to read after The Bacteriological Examination of Water-Supplies?
You can find similar books in the "Read Also" column, or choose other free books by William George Savage to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Then the calculated amount of alkali, less this deduction, is added, and a + ro per cent, reaction is obtained. In other words, alkali is added insufficient to quite neutralize the medium (phenolphthalein neutral point), and the addition of 1*0 per cent, of £ alkali would still be required to make it completely neutral.
As an example of an actual standardization, the follow- ing is given : Two separate 10 c.c. of a i litre of nutrient broth each required the addition of 1*3 c.c. -^ sodium hydra...te solution to make them neutral to phenolphthalein. Therefore, 980 c.c. (i.e,j 1,000 - 20 c.c.) will require ( l -^ x 980^ = \ 10 / 127*4 c.c. tu sodium hydrate solution. This is equal to 1274 (^>~p)cc of g alkali.
One c.c. of £ acid is deducted for each 100 c.c, or 10 c.c.
for the litre. Therefore, 274 (1274-10) c.c. £ alkali is added to the medium, and a + i'o reaction is obtained.
If the medium is already alkaline to phenolphthalein, the sample removed for titration should be made acid by the addition of a definite and accurately pipetted amount of ^j H 2 S0 4 .
What to read after The Bacteriological Examination of Water-Supplies?
You can find similar books in the "Read Also" column, or choose other free books by William George Savage to read onlineMoreLess
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