When solving stoichiometry problems, you have to convert grams to moles, then to moles again, and what is it converted back to in the third step?

explanation:

0.07 g/cm³

1.37 g/cm³

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