the flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. the buret contains 0.310 M NaOH.

Question

1) what volume of NaOH is needed to reach the end point of the titration?

2)what was the initial concentration of HCl?

Answer 1

The balanced equation for the reaction taking place is 

HCl + NaOH ===> NaCl + H2O  (this is acid/base neutralization)

Unfortunately, one cannot answer the questions posed because we don't know the concentration of the HCl, or the volume of the NaOH.  We need to know one or the other.  

 

You might want to review the question and be sure you have included ALL the information.