Assume that you have weighed out 0.5000 g of calcium hydroxide(melted in 200mL). Following exactly the same procedure as in this experiment, calculate the empirical formula of calcium hydroxide for the back titration of one 20.00 mL sample, which used 13.20 mL of NaOH solution. The molarity of the HC1 solution is 2.000 M and the NaOH is 0.1000 M.

Answer: Ca(OH)2

please, I need step by step how fhe answer is Ca OH₂

thanks