Classify each of the following anions as basic or neutral.

Answers
Here is how you do it. Add the H+ to give the original acid

HI

HNO3

HClO2

HF

now which ones are strong acids. The only one is HNO3. The rest are weak acids.

So NO3- is neutral, while the other three are basic, because

I- + H2O = HI + OH-