In a labeled beaker, you obtain about 50 mL of stock solution of sodium hydroxide. The sodium hydroxide stock solution was standardized to 0.019 M. You rinse your buret three times with the solution before filling the buret with the sodium hydroxide. You then obtain a 5.00 mL volumetric pipet and pipet 5.00 mL of vinegar into a clean 125 mL Erlenmeyer flask. You add two drops of phenolphthalein indicator and swirl the contents in the flask. You add about 10 mL of deionized water to wash the inside walls of the flask. The solution at this point is colorless. Your initial buret reading is 23.24 mL. You titrate your acetic acid sample with sodium hydroxide until the first appearance in the flask of a faint pink color that persists when the solution is swirled. At this point you record the final buret reading to be 43.22 mL.