ACELLUS LAB-ACID BASE TITRATION a student overshot the equivalence point when he was using NaOh to determine the concentration of an unknown acid, HA. What ions are present in the purple solution in the flask?

Which terms are used to identify pure substances

Iwould appreciate if someone could me.

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !