Analysis of Tap Water for Metallic Cations

  • Thread starter Thread starter adenine135
  • Start date Start date
  • Tags Tags
    Analysis Water
Click For Summary
SUMMARY

The discussion focuses on the analysis of tap water containing an unknown cation that forms a stable complex with EDTA at pH 10, with a formation constant of 1×1013. The presence of this cation does not interfere with the EBT or Calcon indicators used for detecting Ca2+ and Mg2+ ions. Consequently, the concentration values of Ca2+ and Mg2+ ions determined in the experiment will be inaccurately elevated due to the unknown cation's interference at pH 10.

PREREQUISITES
  • Understanding of EDTA complexation chemistry
  • Knowledge of pH effects on metal ion solubility
  • Familiarity with analytical indicators like EBT and Calcon
  • Basic principles of titration methods in water analysis
NEXT STEPS
  • Research the impact of pH on metal ion complexation with EDTA
  • Study the formation constants of various metal-EDTA complexes
  • Learn about the titration techniques for determining Ca2+ and Mg2+ concentrations
  • Investigate methods for identifying unknown cations in water samples
USEFUL FOR

Environmental chemists, water quality analysts, and laboratory technicians involved in water analysis and cation detection will benefit from this discussion.

adenine135
Messages
7
Reaction score
0
Assume that the tap water to be analyzed contains a certain amount of an unknown cation which forms a complex with EDTA at pH 10 but not at pH 12. The formation constant for the EDTA complex of this unknown cation at pH 10 is 1×10^13. Neither the EBT nor Calcon indicators are affected by the presence of this cation. How would the values of the concentration of Ca2+ ions and the concentration of Mg2+ ions determined in this experiment be affected by the presence of this unknown cation impurity?



I have absolutely no idea where to even start with this one :(
 
Physics news on Phys.org
What experiment? What pH? Details!
 

Similar threads

Chemistry How Does Mg2+ Complex Formation Influence Ca2+ Concentration?
  • · Replies 3 ·
Replies
3
Views
2K
Water Hardness. Calculating Calcium.
  • · Replies 1 ·
Replies
1
Views
3K
Precipitation of lead hydroxide in the presence of EDTA
  • · Replies 5 ·
Replies
5
Views
2K
Calculating pH of Mixture of 0.1 M Na2S and 0.05 M HCl
  • · Replies 1 ·
Replies
1
Views
7K
How pH would affect the dative bonding
  • · Replies 5 ·
Replies
5
Views
3K
April Fool's Physics Papers 2026
  • · Replies 1 ·
Replies
1
Views
406
EDTA titration-(Analytical Chem.)
  • · Replies 6 ·
Replies
6
Views
15K
Bio Homework Review (Please check and Correct)
  • · Replies 11 ·
Replies
11
Views
20K
Is my fictional Solar System stable and realistic?
  • · Replies 21 ·
Replies
21
Views
6K
Graduate Recent research relevant to quasar evolution
  • · Replies 6 ·
Replies
6
Views
4K