Abstract
Spectrophotometric studies have revealed that the yellow colour formed on mixing dilute aqueous solutions of copper (II) chloride and sodium azide is due to a mono-azido-copper complex, with an absorbancy maximum at 367·5 mμ whose formation constant, K has a mean value of (3·724 ± 0·08) × 10. −3. The colour intensity is decreased by the addition of acids and salts furnishing hydrogen, chloride and sulphate ions, but not appreciably by perchlorate or nitrate ions. In the presence of a large excess of azide ions and an appreciable amount of hydrochloric acid, copper (II) can be estimated readily in aqueous solutions in the concentration range of 1–320 p.p.m. spectrophotometrically. The least detectable increment is 1 p.p.m. in the range of 1–10 and 2 p.p.m. in the range of 10–20 p.p.m.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
