Based on CaCo3 + 2HCl --> H2O + CO2 + CaCl. How many ml of 1.00 M NaOH should be used in the titration. 25ml of HCL and 750mg of Tums are combined to simulate an upset stomach.

You don't have all of the needed information (e.g., 25 mL of what M HCl?). It would help if you rephrased the question to clearly show what you want.