Calculate the concentration (in molarity) of hydroxide ion in the resulting solution. Then, determine the pH of the resulting solution

hydroxide-ion

#1

Calculate the concentration (in molarity) of hydroxide ion in the resulting solution. Then, determine the pH of the resulting solution.

Answer:

Molarity = moles / liters = 0.028 mol Ca / 0.055 L = 0.509 Molarity
moles = 1.14 g / 40.078 g/mol = 0.028 mol Ca
liters (given) = 55.0 mL / 1,000 = 0.055 L

Because it is hydroxide (meaning OH) you need to find pOH.
pOH = 14 - ph