A photoelectrochemical cell is an electrochemical cell that uses light to carry out an electrochemical reaction. The silicon electrodes in a photoelectrochemical cell being considered for the production of hydrogen react with water:

Calculate the standard cell potential for the reaction between silicon and water in a cell that also produces hydrogen from water and write the balanced equation for the cell reaction.

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SiO (s) + 4 H (aq) + 4e Si(s) + 2 HO(1) E = -0.84 V