Pre-Lab Question: Identifying Acid with No Reaction to 8 Reactants

[ldixon]

I have a question on a pre-lab that I have to do. The question is:

You determine that test tube number 3 is an acid. It is colorless, odorless and has a very low pH value. You test the sample with all eight(8) reactants available and find no reaction(NR). What is the acid? Explain your answer.

The 8 reactants in the lab are:

KOH
AgNO3
BaCl2
NaCl
NH3(aq)
Ba(OH)2
H2SO4
Cu(NO3)2

I could not figure this out, it seems to me that every acid would react with at leat one of these? Is there an acid that would have no reaction with all of these?

 

[dmoravec]

what are some of the acids you have considered, and what do those acids react with?