Astudent is asked to determine the molarity of a strong base by titrating it with 0.250 m solution of h2so4.

the students is instructed to pipet a 20.0 ml portion of the strong base solution into a conical flask, to add two drops of an indicator that changes at ph = 7, and to dispense the standard h2so4 solution from a buret until the solution undergoes a permanent color change.

the initial buret reading is 5.00 ml and the final reading is 30.00 ml at the equivalence point.

which procedural error will result in a strong base molarity that is too high?

using 4 drops of indicator rather than the recommended 2 drops

using a buret with a tip filled with air rather than the h2so4 solution

using an indicator that changes at ph = 5 rather than at ph = 7

using a conical flask that contains several drops of h2o