how many grams of Ca(OH)2 must be in this solution?

Question

If 47.5 mL of 0.250 M HCl solution is needed to neutralize a solution of Ca(OH)2, how many grams of Ca(OH)2 must be in the solution?

Answer 1

first write down the equation and balance it. from there you can see how many grams of HCl neutralizes how many grams of Ca(OH)2. Then figure how many grams of HCl is in 47.5ml of 0.250 M HCl. Now you can figure out how many grams of Ca(OH)2 can be neutralized by that much HCl.
I'm sure you can figure it out yourself.