19 analyse the electrolysis of brine using mecury cathode and graphite anode. i what gas is liberated at the anode ii khat substance is deposited at the cathode tii tell me the nature of the remain remaining solution. in khat is the effect of mercury as the cathrode. write a balanced equation of the overall reaction. vi given that 1930 c of electricity was passed to b calculate the volume of the gas liberated at the anoc in cm³​