1. It makes international projects easier to handle
2. It avoid errors when some part of a project may be in traditional US units.
Answer:
the hydroxide ions are undergoing ionization and the particles are gaining / losing electrons .
Explanation:
i think it is because ::
the phenolphthalein of the solution has gone from having a pH of around 8 (pink) to being alkaline at above 10 which causes it to burn purple / violet .
