Hach-Lange TITRALAB 840_845 Reference Manual - Manual (Page 142)

Titra Lab ® TitraLab 840 and 845 Reference Manual
Page 142
Reaction X Smp
+ Y Titr Enter stoichiometric coefficients for the reaction between the sample
and the titrant when the following units have been selected:
• Result unit molar or weight (mol, mmol, g, mg, µg, mol/l, mmol/l, g/
l, mg/l, mg/ml, µg/ml, mol/kg, mmol/kg, mg/g, mg/kg, %, g/kg, µg/g
or ppm),
or
• Reagent unit molar (M, mM).
To determine the X and Y stoichiometric coefficients:
The reaction is: X Smp + Y Titr ->
where:
• 1 mole of titrant gives X eq of titrant
• 1 mole of sample gives Y eq of sample
To balance the reaction, Y mole(s) of titrant are required to titrate X
mole(s) of sample.
Example:
Titrant
sodium hydroxide (NaOH). 1 mole of NaOH gives 1 eq of NaOH.
Sample
citric acid (C
3
H
5
0 (COOH)
3
). 1 mole of citric acid gives 3 eq of citric
acid.
3 NaOH +1 C
3
H
5
O(COOH)
3
-> C
3
H
5
0 (COONa)
3
+ 3H
2
O
Enter
Reaction = 1 Smp + 3 Titr ->
Enter in:
Edit method > Results
Range available:
(1 to 20) Smp + (1 to 20) Titr ->
Refer to "Appendix 3: Result calculations", page 205 .