posted by Matt .
A student began adding titrant to the acid solution, but stopped when she suddenly realized that she forgot to add the 3 drops of phenolphthalein. When she did, the solution immediately turned dark red!
What can the student do to correct this error and salvage this trial, so she doesn't have to redo it? What corrections or modifications will have to be made to her recorded data?
The student can add acid back to the solution. The acid can be either a standardized solution (the student will need the volume and the molarity of the standardized acid added) or the student can add a known mass of a solid acid. So,e care must be used in what acid to use in either case.