Question

The concentration of an ion in a solution, the greater is the probability of it being discharged at its appropriate electrode.

Answer 1

The concentration of ions in solution depends on the mole ratio between the dissolved substance and the cations and anions it forms in the solution. Ion concentration is usually expressed in moles per liter.

Complete step by step answer:
- An ion is an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons. Cation is a positive ion formed by the loss of electrons and is attracted to the cathode. Anion is the negative ion formed by the gain of electrons and is attracted to the anode in electrolysis.
- The higher the concentration of an ion in a solution, the greater is the probability of it being discharged at its appropriate electrode. Higher the concentration of an ion, the higher will be the electrode potential. Therefore, higher is the electrode potential, higher is the probability of it being discharged at its appropriate electrode. The correct answer is option “A” .

Additional Information :
Electrolysis is defined as a process of decomposing ionic compounds into their elements by passing a direct electric current through the compound in a fluid form. The cations are reduced at the cathode and the anions are oxidized at the anode. The main components required in electrolysis are an electrolyte, electrodes and an external power source. This process helped in the study of chemical reactions in obtaining pure elements. Thus it is used widely in separating and obtaining pure elements. Some factors that may affect electrolysis are the nature of the electrode, nature and state of electrolyte, overvoltage at the electrodes, etc. Important applications of electrolysis include determination of equivalent weight of substances, purification of metals, metallurgy of alkaline and alkaline earth metals, electroplating for corrosion resistance, manufacture of pure gases, manufacture of compounds like Sodium carbonate, Potassium chlorate, $NaOH$ etc.

Note: Electrode potential is the tendency of an electrode to get oxidized or reduced and cell potential is the difference between the electrode potentials of a given cell.