A1.00 l buffer solution is 0.250 m in hf and 0.250 m in naf. calculate the ph of the solution after the addition of 100.0 ml of 1.00 m hcl. the ka for hf is 3.5 × 10-4.

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