The sampling procedure for temperature close to “35
” was repeated from step 1 to step 4.
Part D: Titration of the Borax Sample Solution
A 50-mL burette with HCl solution was rinsed and filled until there are no air bubbles
along the inside surface of the burette.
The 5-mL sample was poured into a clean conical flask. The test tube was rinsed with
several portions of the warm rinsed water. The rinsed solutions were transferred to the
flask and the mixture was swirled.
Three drops of bromocresol green indicator were added to the flask.
The solution was titrated with the standardized HCl until the solution turns from blue to
The above procedure was repeated for all the other borax sample.