You have a saturated solution of Ca(OH)2 in a flask; meaning there is some solid Ca(OH)2 sitting at the bottom of the aqueous solution. Which of the following will increase the Ca2+ concentration in solution?
Adding water to the solution.
Adding HCl(aq) to the solution.
Adding KOH(aq) to the solution.
Adding more Ca(OH)2(s) to the flask.