I am wondering why I can plot scatter data onto an activity diagram (ac2 plot) of log [K+]/[H+] vs. log [siO2(aq)], where [ ] indicates activity, but when I try to plot a similar diagram for log [Ca++]/[H+]^2 vs. log [siO2(aq)], I get the following error
"scat: Can't plot scatter data; doesn't contain: log ratio Ca++/H+^2".
The scatter data "scripts" that I have been using are the follows:
# Act2 scatter data for activity diagram
"SiO2(aq)" "K+/H+"
---------------------
-4.5052 5.8563 blue blot
-3.4015 4.0147 green triangle
-3.3841 4.3142 red blot
-3.3813 4.6157 red triangle
-3.4283 4.0639 red square
-3.3579 4.5173 green square
and:
# Act2 scatter data for activity diagram
"SiO2(aq)" "Ca++/(H+)^2"
-------------------------------
-4.5052 12.924 blue blot
-3.4015 10.2125 green triangle
-3.3841 10.6879 red blot
-3.3813 11.3482 red triangle
-3.4283 9.8096 red square
-3.3579 11.6956 green square
Again, the one for potassium works fine, but the one for calcium is right out.
Thanks,
Karen