Using the thermodynamic data given in the following table, calculate an activity diagram showing the stability fields of gibbsite {Al(OH)3}, kaolinite {Al2SizOs(OH)4}, pyrophyllite {Al2Si4O10(OH)2}, Ca-beidellite {Ca1/6Al7/3Si11/3010(OH)2}, and laumontite {CaAl2Si4O12 4H₂O} at 25°C. Your diagram should have aCa2+/(aH)2 as the y-axis and aH4SiO40 as the x-axis. Also, plot the lines representing saturation with quartz and amorphous silica: AG° (kJ mol) AG° (kJ mol) gibbsite -1151 laumontite kaolinite -3800 Ca Ca2+ -6711 -553.58 pyrophyllite -5275 H₁SiO4º 0 Ca-beidellite -1316.6 -5388 H2O(1) -237.15 Note, you will need to calculate 7 boundaries: gibbsite-kaolinite, gibbsite-laumontite, kaolinite-laumontite, laumontite-Ca-beidellite, kaolinite-Ca-beidellite, kaolinite pyrophyllite, and pyrophyllite-Ca- beidellite.
Using the thermodynamic data given in the following table, calculate an activity diagram showing the stability fields of gibbsite {Al(OH)3}, kaolinite {Al2SizOs(OH)4}, pyrophyllite {Al2Si4O10(OH)2}, Ca-beidellite {Ca1/6Al7/3Si11/3010(OH)2}, and laumontite {CaAl2Si4O12 4H₂O} at 25°C. Your diagram should have aCa2+/(aH)2 as the y-axis and aH4SiO40 as the x-axis. Also, plot the lines representing saturation with quartz and amorphous silica: AG° (kJ mol) AG° (kJ mol) gibbsite -1151 laumontite kaolinite -3800 Ca Ca2+ -6711 -553.58 pyrophyllite -5275 H₁SiO4º 0 Ca-beidellite -1316.6 -5388 H2O(1) -237.15 Note, you will need to calculate 7 boundaries: gibbsite-kaolinite, gibbsite-laumontite, kaolinite-laumontite, laumontite-Ca-beidellite, kaolinite-Ca-beidellite, kaolinite pyrophyllite, and pyrophyllite-Ca- beidellite.
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter20: Chemistry Of Selected Transition Elements And Coordination Compounds
Section: Chapter Questions
Problem 38QRT
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
Transcribed Image Text:Using the thermodynamic data given in the following table, calculate an activity diagram
showing the stability fields of gibbsite {Al(OH)3}, kaolinite {Al2SizOs(OH)4},
pyrophyllite {Al2Si4O10(OH)2}, Ca-beidellite
{Ca1/6Al7/3Si11/3010(OH)2},
and
laumontite {CaAl2Si4O12 4H₂O} at 25°C. Your diagram should have aCa2+/(aH)2 as the
y-axis and aH4SiO40 as the x-axis. Also, plot the lines representing saturation with quartz
and amorphous silica:
AG° (kJ mol)
AG° (kJ mol)
gibbsite
-1151
laumontite
kaolinite
-3800 Ca
Ca2+
-6711
-553.58
pyrophyllite
-5275 H₁SiO4º 0
Ca-beidellite
-1316.6
-5388 H2O(1)
-237.15
Note, you will need to calculate 7 boundaries: gibbsite-kaolinite,
gibbsite-laumontite, kaolinite-laumontite, laumontite-Ca-beidellite,
kaolinite-Ca-beidellite, kaolinite pyrophyllite, and pyrophyllite-Ca-
beidellite.
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