Question

Determine [OH−] in each base solution. If the acid or the base is weak, indicate the value that [OH−] is less than 0.25 M

Sr(OH)2

Answer 1

The hydroxide ion concentration, [OH-], in a solution of the strong base Sr(OH)2 can be found by doubling the molarity of the Sr(OH)2 solution, as it completely dissociates into Sr2+ and 2 OH- ions in water.

Step-by-step explanation:

The question asks to determine the concentration of hydroxide ions, [OH−], in a solution of Sr(OH)2, which is a strong base. Since Sr(OH)2 is 100% ionized in aqueous solution, the [OH−] can be directly determined from the molarity of the Sr(OH)2 solution. For example, if the concentration of Sr(OH)2 is 0.25 M, then because each formula unit of Sr(OH)2 produces two OH− ions, the [OH−] will be double the concentration of Sr(OH)2, which is 0.50 M in this case.