Select the statement that describes what an ion-selective electrode, or ISE, measures. the difference in potential between cations and anions in the solution the difference in potential between the internal electrode, surrounded by a solution of a known and fixed concentration, and the reference electrode placed in a sample solution the ion charge the ion concentration in the solution sample

A Galvanic cell consists of Mg electrode in a 1.0 mol L -1 Mg(NO3)2 solution and a Ag electrode in a 1.0 mol L-1 AgNO3 solution. Calculate standard emf for the spontaneous reaction of this electrochemical cell at 25 C

None

Batteries are charged and discharged due to the concentration of the solutions inside. Calculate the voltage of a battery made from zinc in a 0.1M solution of Zn2+ and a metal X in a 1 M X2+ solution using the table of reduction potentials and Eq. 6 at 25 degrees C. Answer with the unit V, to two decimal places. The standard reduction potential of X is -0.24 volts.