Final answer:
To calculate the mass of calcium hydroxide required to prepare the solution, we need to determine the concentration of hydroxide ions ([OH-]) using the given pOH value. By finding the pH, we can calculate the concentration of hydroxide ions. Multiplying the concentration by the volume of the solution will give us the number of moles of calcium hydroxide required, and multiplying that by the molar mass will give us the mass of calcium hydroxide required.
Step-by-step explanation:
To calculate the mass of calcium hydroxide required to prepare the solution, we first need to determine the concentration of hydroxide ions ([OH-]). Since Ca(OH)2 is a strong base, the concentration of hydroxide ions is two times the concentration of the solute, which is 0.0044 M. Therefore, [OH-] = 2 * 0.0044 M = 0.0088 M. Using the Kw expression, we can solve for [H3O+] by rearranging the equation algebraically. With the concentration of [H3O+], we can calculate the pH using the equation pH = -log[H3O+].
Knowing the pOH, which is given as 1.145, we can calculate the pH using the relationship pH = 14 - pOH. Once we have the pH, we can determine the concentration of hydroxide ions using the equation pOH = -log[OH-]. By multiplying the concentration by the volume of the solution, we can calculate the number of moles of calcium hydroxide required to prepare the solution. Finally, by multiplying the number of moles by the molar mass of calcium hydroxide, we can calculate the mass of calcium hydroxide required.