i would to ask a question about chemisry. does pH of solution affects the oxidatin reaction?

Question

thank you..........

Answer 1

Yes ,of course pH of solutions affects oxidation reaction....
for example.....
relation between the rate of the catalytic reaction of iodide oxidation with hydrogen peroxide in an acid medium in the presence of zirconium and hafnium salts and the pH of the solutions. It was found that the maximum catalytic activity is at pH 1.1 for zirconium and at pH 2.2 for hafnium. It was established that when zirconium and hafnium are present together in the solution their effect on the rate of the catalytic reaction is an additive one. A kinetic method is suggested for the analysis of mixtures in solutions containing zirconium and hafnium. (auth)

Take care
bye

Answer 2

Yes, it can. For example under acid conditions, the oxidant permanganate (MnO4-) with oxidation state +7 gets reduced all the way to Mn^(2+), while in basic solution, it becomes only MnO2 (oxidation state +4).

Answer 3

that depends on the reaction. if it includes H+ or OH-, as many redox reactions do, the rate and position of equilibrium will be affected by pH.

see for instance http://en.wikipedia.org/wiki/Standard_electrode_potential_(data_page)