Abstract
The reactions of oxalic acid with Mg 2+, Ca 2+ and Zn 2+ in aqueous medium were investigated. When 0·01 m oxalic acid solutions spiked with various levels of Zn 2+ were titrated against standard KMnO 4 solutions, a linear relationship was obtained between the amount of precipitated oxalate and the metal ion concentrations. A similar observation was made for Ca 2+, but higher proportions of the oxalate were precipitated at equivalent metal ion concentrations. The relationshps were also confirmed by titrating standard metal ion solutions, spiked with various levels of oxalic acid, against standard EDTA solutions. When Mg 2+ was present in solution with Zn 2+ or Ca 2+ or with the mixture, it inhibited the precipitation of the oxalates. The inhibitory action was most noticeable when the metal ions were present in solution in a 1:1:1 molar ratio. In all cases, the higher the proportion of Mg 2+, the less the precipitation of the oxalates of the other two metals.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.