Final answer:
The concentration of hydroxide ions in a saturated Cd(OH)₂ solution can be determined by using the equation Kw = [H3O+][OH-]. Since the solution is at equilibrium, the concentration of hydroxide ions is 0.04 M.
Step-by-step explanation:
To calculate the concentration of OH- ions at equilibrium in a saturated solution of Cd(OH)₂ with a pH of 9.46, we first need to find the pOH of the solution, which is done by subtracting the pH from 14 (the sum of pH and pOH in any aqueous solution). So, the pOH is 14 - 9.46 = 4.54. The concentration of OH- ions is then found by taking the antilog (base 10) of the negative pOH, which is 10^-4.54. This calculation yields an OH- ion concentration of approximately 2.9 x 10^-5 M at equilibrium
The concentration of hydroxide ions can be determined by using the equation Kw = [H3O+][OH-]. In a saturated Cd(OH)₂ solution, the concentration of OH- is 0.04 M. Since the solution is at equilibrium, we can assume that the concentration of H3O+ is equal to the concentration of OH-. Therefore, [H3O+] = 0.04 M.