The book A Text book of Chemical Arithmetic was written by author Horace L Horace Lemuel Wells Here you can read free online of A Text book of Chemical Arithmetic book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Text book of Chemical Arithmetic a good or bad book?
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00 = 2. 875 The ratio of the atoms is, consequently, shown by the formula Nai. G85C. 94250 2 . 875, which may be simplified to Na 2 C0 3 by dividing by the smallest number in the original ratio. It is not necessary that the composition should be expressed in terms of the elements, for the formula may be found just as readily when groups of atoms are used. For example, the composition of sodium carbonate may be expressed in terms of the oxides Na 2 and CO 2, and the 'formula may then be derived ...by dividing by the formula weights of the groups: . Percentage, Ratio. / Na 2 O, 58, 53 - 62. 10 = . 9425 1. C0 2, 41. 47 - 44. 00 = . 9425 1. The formula, therefore, is (Na 2 0)i(C0 2 )i, or Na 2 C0 3 . Again, the composition of this compound may be expressed in terms of Na and C0 3 as follows: Percentage, Ratio. RaS Na, 43. 45 -f- 23. 05 = 1. 885 2. C0 3, 56. 55 *- 60. 00 . 9425 1. The formula Na 2 C0 3 is arrived at in this way also, CALCULATIONS RELATING TO WEIGHTS, 57 It is to be noticed that it is not necessary that the composition in parts by weight should be expressed in terms of percentages in order that a formula may be calculated, for if the composition by weight is expressed in any other terms whatever, the simplified ratio must evidently be the same.
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