Read the scenario below, determine your answer, then click on the link to see if you are right!
Luigi, a process engineer, currently uses a 20% hydrofluoric acid in his etching process. He is considering using a higher concentration of this acid in order to speed up his operation. Currently, he stores the acid in a 40-gallon double-wall tank made of high-density polyethylene (HDPE). He pumps the acid out of this tank using an air-operated pump with wetted materials of Kynar® PVDF and PTFE.
What concentration of hydrofluoric acid can Luigi safely use given his current equipment?
A. He needs to stay with his current 20% concentration there is no way to speed up the operation.
B. He can increase to a 50% hydrofluoric acid to improve his process.
C. He can increase to a 75% hydrofluoric acid to improve his process.
D. He can increase to a 100% hydrofluoric acid for maximum speed.