Some salts are, incredible though it may appear, less soluble
in boiling water than in cold. Water just above the freezing-point
dissolves nearly twice as much lime as it does when boiling. You see,
then, that a knowledge of certain important facts like these may be so
used as to considerably mitigate your coal bills, under given
circumstances and conditions.
LECTURE IV
WATER: ITS CHEMISTRY AND PROPERTIES; IMPURITIES AND THEIR ACTION; TESTS
OF PURITY--_Continued_
In the last lecture, under the head of "Solution," I mentioned that some
salts, some chemical substances, are more soluble in water than others,
and that their solubilities under different circumstances of temperature
vary in different ways. However, some salts and compounds are
practically insoluble in water under any circumstances. We now arrive at
the important result known to chemists as the precipitation of insoluble
compounds from solutions. In order to define this result, however, we
must, of course, first consider the circumstances of causation of the
result.
Pages:
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70