Which Chemical Compounds Form Acidic Aqueous Solutions?

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SUMMARY

The discussion centers on identifying which chemical compounds form acidic aqueous solutions, specifically highlighting that only HCOOH (formic acid) qualifies as acidic among the listed compounds: C2H2 (acetylene), C3H8 (propane), CH3OH (methanol), HCOOH, CH3OCH (dimethyl ether), and benzene. The participants emphasize the importance of recognizing functional groups, such as carboxylic acids, to determine acidity. Additionally, the discussion touches on the necessity of understanding molecular polarity and hydrogen bonding to assess the properties of these compounds.

PREREQUISITES
  • Understanding of functional organic groups, specifically carboxylic acids.
  • Knowledge of molecular polarity and its impact on solubility.
  • Familiarity with hydrogen bonding and its significance in chemical interactions.
  • Basic principles of acid-base chemistry, including the formation of hydronium ions (H3O+).
NEXT STEPS
  • Study the properties of carboxylic acids and their behavior in aqueous solutions.
  • Learn about molecular polarity and how it affects solubility and reactivity.
  • Explore the concept of hydrogen bonding in organic compounds.
  • Investigate acid-base reactions and the role of hydronium ions in determining acidity.
USEFUL FOR

Chemistry students, educators, and anyone interested in organic chemistry and acid-base reactions will benefit from this discussion.

Jaggis
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Homework Statement



Which of the following chemical compounds are acidic aqueous solutions?

C2H2, C3H8, CH3OH, HCOOH, CH3OCH and benzene.

Homework Equations

Not known.

The Attempt at a Solution



The hydrocarbons aren't polar, that much I know. In the list there are, however, two polar compounds...

I know the answer is that only HCOOH is an acidic aqueous solution, but no explanation is given. Am I supposed to be able to tell which ones are acidic aquenous solutions simply by looking at the chemical formula? Should I write the reaction first ([compound] + H2O → ...) and if so, how would I know what the products are in each case? After all, wouldn't I need the products in order to determine how much H3O- and HO-ions are produced?
 
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Actually, I also have a second question: which of the above mentioned compunds form hydrogen bonds between molecules? The book gives me the answer but not explanation.

Again, how am I supposed to know this simply by looking at the formulas?
 
It is about functional organic groups and recognizing alcohol, aldehyde and carboxylic acids.
 

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