Answers are grounded in this paper and cite their sources.
The effect of the boric acid concentration on the color reaction between partially saponified poly(vinyl acetate), which is dissolvable in water, and iodine‐iodide was investigated. As the concentration of boric acid increased, the absorbance at λmax = 488 nm of the red‐violet complex, which is due to a long sequence of vinyl acetate units distributed along the polymer chain, increased gradually, reached a maximum, and then decreased from the point in which the absorbance at λmax = 656nm of the blue complex, based on the vinyl alcohol units in the polymer, was observed. The color complex in an excess of boric acid transferred from red‐violet to red‐tinged blue with time. From the color change, the molar absorption coefficient at λmax = 656 nm for the iodine molecule in the blue complex was found to be 3,92.104l/(mol cm).
No takes yet. Share an insight, caveat, or question.
Hayashi et al. (1977) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: