sodium chloride (Nacl) and unhydrous aluminium chloride (Alcl3) are both chloride of metals of period arod (III) molten Nacl can be electrolysed while molten unhydrous Aluminium chloride can not

it is stable as it is in group 0 which have full outer shells of electrons

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l