Answer:
Neither NaOH nor Ca(OH)2 are phosphates. NaOH is sodium hydroxide and Ca(OH)2 is calcium hydroxide. Calcium hydroxide has a higher pH than sodium hydroxide because there are two hydroxides for every calcium ion in Ca(OH)2. This means that every time a single Ca(OH)2 dissociates, two hydroxide ions will contribute to the pH of the solution, while every time that a single NaOH dissociates, only one OH will be released to contribute to the pH.