The table below shows the data for three titrations to determine the concentration of a NaOH solution With standard 0.200 M HCl solution using phenolphthalein as the indicator Which explanation best accounts for the lower value of the NaOHM in Trial 3 ?

The table below shows the data for three titrations to determine the c

1.	The table below shows the data for three titrations to determine the concentration of a NaOH solution With standard 0.200 M HCl solution using phenolphthalein as the indicator Which explanation best accounts for the lower value of the NaOHM in Trial 3 ?
Answer» Some of the neutralized solution from Trial 2 was left in the flask for Trial 3. The NUMNER of drops of phenolphtalein was doubled in Trial 3. The HCL CONCENTRATION was used as 0.250 M in the NaOH molarity calculation . A few drops of NaOH solution were spilled on the desktop in Trial 3. Answer :d