First, figure out the balanced equation: HCl + NaOH -> NaCl + H2O (already balanced) Now, convert the milliliters to liters since molarity is moles/liters 10 ml = 0.01 L 30 ml = 0.03 L Now, set up the equation and type this into the calculator: (0.01 L HCl) x (1.00 mol HCl) x (1 mol NaOH) x (1)/ (1) x (1 L HCl) x (1 mol HCl) x (0.03 L NaOH) This should equal 0.333333 mol/L or M of NaOH
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.
