Calculate the terminal velocity of a droplet (radius =r, density=\rho_d) when its settling in a stagnant fluid (density=\rho_f).

Explanation:

Given that

Radius =R

When drop let will move downward then so

Fb = Bouncy force

Fd = Drag force

We know that

μ=Dynamic viscosity of fluid

V= Terminal velocity

So at the equilibrium condition

So

This is the terminal velocity of droplet.

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