[ldixon]

I have a question on a Lab question 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 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?

[mike]

Does NR or no reaction mean that there is no "visible" or noticable reaction like color change, bubbles steam etc?

[ldixon]

Yes I think so, But I will check with my professor on it.  Do you have any ideas?

[Bakegaku]

I think that he's saying the acid will react in such a way with each of those to either produce no reaction or the products will be soluble and not change the colour of the solution.