Lessons in Elementary Chemistry
Lessons in Elementary Chemistry
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On examination we find that only one such compound of silver and acetic acid exists ; and we find by experiment that 100 parts of silver acetate contain 64*68 parts by weight of silver ; hence, the molecular weight 01 the car- bon, hydrogen, and oxygen, united with silver (Ag = 108), is 35 3^ X^Q ^ 58-98. In this silver acetate, however, 64*00 one atom of hydrogen of the glacial icid was replaced by one of silver, so that the molecular weight of the glacial acetic acid is found to be r8-98-i-i ...=59*9^ or its formula is: 2 C = 24 4H= 4 20 = 32 60 The slight difference observed between the found (59*98) and the Calculated (60), molecular weight arises from 252 ELEMENTARY CHEMISTRY. [LESSON unavoidable errors of experiment; the more analyses of the substance are made, the nearer will the mean result approach the calculated numbers.
In a similar manner the molecular weights of organic bases are determined by ascertaining the weight of the substance which unites with a known weight of hydro- chloric acid to form a salt In the case of certain organic acids and bases, two or more compounds containing different proportions of silver (or other metal) and hydro- chloric (or other acid) are known, and it becomes a matter for consideration which of these is to be taken as con- taining one molecule of the organic compound to one atom of metal or acid ; the choice in these cases is determined by the general properties of all the conipounds, which never fail to point out the true character of the substance.
What to read after Lessons in Elementary Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Roscoe, Henry E. (Henry Enfield), 1833-1915 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
On examination we find that only one such compound of silver and acetic acid exists ; and we find by experiment that 100 parts of silver acetate contain 64*68 parts by weight of silver ; hence, the molecular weight 01 the car- bon, hydrogen, and oxygen, united with silver (Ag = 108), is 35 3^ X^Q ^ 58-98. In this silver acetate, however, 64*00 one atom of hydrogen of the glacial icid was replaced by one of silver, so that the molecular weight of the glacial acetic acid is found to be r8-98-i-i ...=59*9^ or its formula is: 2 C = 24 4H= 4 20 = 32 60 The slight difference observed between the found (59*98) and the Calculated (60), molecular weight arises from 252 ELEMENTARY CHEMISTRY. [LESSON unavoidable errors of experiment; the more analyses of the substance are made, the nearer will the mean result approach the calculated numbers.
In a similar manner the molecular weights of organic bases are determined by ascertaining the weight of the substance which unites with a known weight of hydro- chloric acid to form a salt In the case of certain organic acids and bases, two or more compounds containing different proportions of silver (or other metal) and hydro- chloric (or other acid) are known, and it becomes a matter for consideration which of these is to be taken as con- taining one molecule of the organic compound to one atom of metal or acid ; the choice in these cases is determined by the general properties of all the conipounds, which never fail to point out the true character of the substance.
What to read after Lessons in Elementary Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Roscoe, Henry E. (Henry Enfield), 1833-1915 to read onlineMoreLess
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