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

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SUMMARY

The discussion centers on identifying an acid that does not react with eight specific reactants: KOH, AgNO3, BaCl2, NaCl, NH3(aq), Ba(OH)2, H2SO4, and Cu(NO3)2. The key conclusion is that a strong acid like hydrochloric acid (HCl) could potentially show no reaction with these reactants under certain conditions, particularly if the reactants do not form a precipitate or gas. The low pH value of the sample indicates it is indeed an acid, but the lack of observable reactions suggests it may be a non-volatile or weakly reactive acid.

PREREQUISITES
  • Understanding of acid-base chemistry and pH levels
  • Familiarity with common laboratory reactants and their properties
  • Knowledge of precipitation reactions and gas evolution in acid-base reactions
  • Basic skills in interpreting chemical reactions and identifying products
NEXT STEPS
  • Research the properties of hydrochloric acid (HCl) and its reactivity with various compounds
  • Study the concept of non-volatile acids and their behavior in chemical reactions
  • Explore the principles of acid-base reactions and the role of pH in determining reactivity
  • Investigate the specific reactions of the listed reactants with different types of acids
USEFUL FOR

Chemistry students, laboratory technicians, and educators seeking to deepen their understanding of acid reactivity and laboratory analysis techniques.

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

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