Physico Chemical Calculations
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For the first dissociation of carbonic according to the equation H2GO.3 = H* + HCO3', the law of mass-action gives [H J [HG0,1 _ „ '(^> [H^COJ -^»' and for the second dissociation according to the equation HCO,' = H- + 00," we obtain similarly [H-] [CO,"] ^ ^ (3) divided by (4) gives (2), thus [00,"] [H,COJ ~ ■"■ " IT,- By multiplying (1) by (2) we obtain , [Ca--][HCO,T _ c, ^ £2 The law of electro-neutrality requires 2[0a--] + [H-] = [HOO3'] + 2[00,"].
Since carbonic acid is a very weak acid, ...[H*] is very small even in presence of free HgCOg, and [CO3"] may be neglected in comparison with [HCO3']. We thus obtain 2[0a--] = [HC0,1.
The concentration of Ca • '-ions, and, therefore, the solu- bility of calcium carbonate' in water containing carbonic acid, may be calculated from equation (5) if the concentration of the free carbonic acid, \B.^(jO^, in the solution is known.
This may be obtained with the help of the factor of propor- tionality K^, which is given. If the partial pressure of the GOj over the solution is ^, then [H2CO3] = K^.
What to read after Physico Chemical Calculations?
You can find similar books in the "Read Also" column, or choose other free books by Joseph Knox to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
For the first dissociation of carbonic according to the equation H2GO.3 = H* + HCO3', the law of mass-action gives [H J [HG0,1 _ „ '(^> [H^COJ -^»' and for the second dissociation according to the equation HCO,' = H- + 00," we obtain similarly [H-] [CO,"] ^ ^ (3) divided by (4) gives (2), thus [00,"] [H,COJ ~ ■"■ " IT,- By multiplying (1) by (2) we obtain , [Ca--][HCO,T _ c, ^ £2 The law of electro-neutrality requires 2[0a--] + [H-] = [HOO3'] + 2[00,"].
Since carbonic acid is a very weak acid, ...[H*] is very small even in presence of free HgCOg, and [CO3"] may be neglected in comparison with [HCO3']. We thus obtain 2[0a--] = [HC0,1.
The concentration of Ca • '-ions, and, therefore, the solu- bility of calcium carbonate' in water containing carbonic acid, may be calculated from equation (5) if the concentration of the free carbonic acid, \B.^(jO^, in the solution is known.
This may be obtained with the help of the factor of propor- tionality K^, which is given. If the partial pressure of the GOj over the solution is ^, then [H2CO3] = K^.
What to read after Physico Chemical Calculations?
You can find similar books in the "Read Also" column, or choose other free books by Joseph Knox to read onlineMoreLess
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