Consider a galvanic cell at T 298K. F = 96 485C. At the beginning (to), [Ca2+] = 0.01M, [H*] = 1M, [HfO2+] = 2M. %3D Consider the half-reactions below: Ca (ag) + 2e → Ca(s) EO red = - 2.76 V HFO2* (aq) + 2H (aq) + 4e¯ -→ Hf(s) + H20() E red = -1.72 V Find the general reacțion, E° cell, and identify the cathode and the anode. Indicate the directi a. electrons (from which solid plate to the other solid plate). b. Write the line notation for this cell. С. Find AGO. *d. Express and calculate Q (at to) e. Express and calculate K. f. What value do you expect for Ecell at this point? Why? g. Find Ecell (at to) After a certain period of time (t), the Ht concentration is one-fifth of its initial concentration. *h. Do the RICE and find the concentrations of all species at t1

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.