https://bugs.kde.org/show_bug.cgi?id=192485 Summary: wrong calculation in the equation solver
Product: kalzium
Version: unspecified
Platform: unspecified
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
AssignedTo:
kalzium@...
ReportedBy:
fr.meral@...
Version: 2.2.1 (using 4.2.2 (KDE 4.2.2), Mandriva Linux release
2009.1 (Cooker) for i586)
Compiler: gcc
OS: Linux (i686) release 2.6.29.1-desktop-4mnb
In the Equation solver, if we enter the following equation :
a MnO4[-] + b Cl[-] + c H[+] -> d Mn[2+] + e Cl2 + f H2O
the solver gives the following answer which is false as regards Cl2 :
1 MnO4- + 5 Cl- + 8 H+ -> 1 Mn2+ + 2 Cl2 + 4 H2O (1 Cl is missing)
if we replace e by the value 5 in the equation, then the solver gives the
correct answer (conservation of matter) :
2 MnO4- + 10 Cl- + 16 H+ -> 2 Mn2+ + 5 Cl2 + 8 H2O
I have not the code but I suspect that the problem might be that in the initial
equation the result for Cl2 is 5/2 rounded down to 2 in order to have an
integer, whereas in this type of situation all the coefficient should be
multiplied by 2 to give the correct answer.
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