CAN SOMEONE GIVE ME A STEP BY STEP EXPLANATION ? At what cathode potential will Sb(s) deposition commence

from 0.010 M SbO solution at pH 0.00? Express this potential ver-

sus S. H.E. and versus Ag | AgCl.
SbO 2H 3e Δ Sb(s) H2O E° -

0.208 V

(b) What percentage of 0.10 M Cu2 could be reduced electrolyti-

cally to Cu(s) before 0.010 M SbO in the same solution begins to

be reduced at pH 0.00​

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

it's all four options.

the answers would be

the first one and the second one