Kinetics of the reduction of hexacyanoferrate(III) by ascorbic acid - The

1996

U. S. MEHROTRA, M. C. AGRAWAL, AND S. P. MUSHRAN

Table VI: Estimate of pk Values of Halogen Acids from Protonation in Sulfuric and Perchloric Acids

Acid solvent

HzSOi

Acid solvent concn a t Halogen half-protonation acid of halogen acid, %

HzS04

HCl HBr

H2S04

HI

HCIOd HClOi HClOi

HC1

-75

>80 >70

HBr

-57 >80

HI

>80

H- a t halfprotonation

-6.8