In a mechanical clock, the swinging of a pendulum causes the hands to move. the diagram shows the path of the pendulum as it swings. at which point in its swing does the pendulum have the least gravitational potential energy?

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