A solution was prepared by dissolving 43.0 g of KCl in 225 g of water. 1. Calculate the molarity of KCl in the solution if the total volume of the solution is 239 mL.

2. Calculate the molality of KCl in the solution.

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