3. You are asked to separate sand and sodium chloride. Name the methods needed to carry out the procedure. Explain how you would carry out the procedure to
obtain pure sand and sodium chloride back,

i think is conclusions.i think so

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