CHAPTER 1 • Sea Water as an Electrolyte
13
_ :1 :~: 0' 0: oN": 0: '~
10 '1 -----.------,------r-----,------,------r-----.------.-----~
o
Mg 2+
01 0
Q
o---l
~
"-...D ______ 0 ___ 0 - - -0-0- __
-10 1
()pl------~----~----~------~----~
i - ] .. ~.~"e~-.: ~~-~--:-~. I
III
QI
~
10 I I --.--------r---r--,-----r------.-----.-------.--~
Ca2+
o~--------------~
-10 f-20 f- 30 f20
\
\
\
I
40
-
\
!::,. !::,.
\
!::,.\ - - - - - - ~- - -~ - - - -
!::,. !::,. -
I
I
60
80
100
CJ(%o)
Fig. 1.10. The changes in the cations during the evaporation of Mexican lagoon waters
water. Since most natural waters have NaCI as their major salt, the properties of this
salt can be useful as a model for many of these waters.
The reliability of this dilution principle is demonstrated (for the measured relative
density) for an estuarine system and sea water diluted to the same salinity (Fig. 1.13).
The values of the density of sea water diluted to the same salinity are equal to within
3 ppm. More recently the density of Lake Tanganyika waters has been measured