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TitraLab
®
Reaction X Smp
+ Y Exc
Enter stoichiometric coefficients for the reaction between the sample
and the titrant in excess when the following units have been selected:
• Excess titrant unit (M, mM),
or
• Titrant unit (M, mM)
To determine the X and Y stoichiometric coefficients:
The reaction is: X Smp + Y Exc ->
where:
• 1 mole of titrant gives X eq of titrant in excess
• 1 mole of sample gives Y eq of sample
To balance the reaction, Y mole(s) of excess titrant are required to
titrate X mole(s) of sample.
Example:
Titrant in excess
sodium hydroxide (NaOH). 1 mole of NaOH gives 1 eq of NaOH.
Sample
citric acid (C
H
0 (COOH)
3
5
acid.
3 NaOH +1 C
H
O(COOH)
3
5
Enter
Reaction = 1 Smp + 3 Exc ->
Enter in:
Edit method > Results
Range available:
(1 to 20) Smp + (1 to 20) Exc ->
When you enter the coefficients of X Smp + Y Exc ->, please
also check the coefficients of the X Exc + Y Titr -> equation (line
below in the Results screen).
Y of Titr is always equal to X of Smp: it may be necessary to
change the X coefficient of the X Exc + Y Titr -> equation.
Refer to "Appendix 3: Result calculations", page
TitraLab 870 Reference Manual
). 1 mole of citric acid gives 3 eq of citric
3
-> C
H
0 (COONa)
3
3
5
+ 3H
O
3
2
263.
Page 187
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