Identifying Weak Acids: HCNO, HBr, HF, HNO2, and HCN

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Discussion Overview

The discussion revolves around identifying which of the given compounds (HCNO, HBr, HF, HNO2, and HCN) is not a weak acid. Participants explore the classification of these acids, referencing textbooks and personal experiences with chemistry concepts.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant notes confusion regarding the classification of HCNO, stating it was marked wrong on a test despite being considered a weak acid in other sources.
  • Another participant asserts that HBr is the correct answer, referencing common chemistry textbooks that list strong acids.
  • A participant expresses uncertainty about HF, initially considering it might be a strong acid due to fluorine's electronegativity, but later finds this notion to be incorrect.
  • A later reply comments on the complexity of fluorine's behavior in acid strength, suggesting it can lead to misconceptions among students.

Areas of Agreement / Disagreement

Participants do not reach a consensus on which acid is not a weak acid, with differing views on HBr being a strong acid and uncertainty surrounding HF and HCNO.

Contextual Notes

Participants reference various sources, including textbooks and online information, which may have differing classifications of these acids. The discussion highlights the potential for confusion in acid strength classification.

Who May Find This Useful

Students studying chemistry, particularly those learning about acid-base theory and classifications of acids.

professor
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i had this question on atest recently, it said to identify whish of these is not a weak acid: HCNO : HBr : HF : HNO2 : HCN. Now the problem i am having with his, is in my book it gives that theyre common acids...ig deal, not if theyre strong or weak, and on the internet as far as i have found theyre all weak acids. This puzzles me greatly. I can tell you one more thing, the one i hadent seen enough to be sure (HCNO) definitely isent it, because that's the one i put down, and it was marked wrong.
 
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HBr is the correct answer.

Usually in chemistry textbooks they give you a table of six strong acids. HBr, HCl, HI, H2SO4, H3PO4, and HNO3. Double check your notes and book. It's probably in there.
 
thats what i was starting to lean towards, though i fugured it might have been hf too because of flourine's strong electronegativity, then i did look that up though an was disprooved fairly quickly.
 
Yeah, you wouldn't be the first chemistry student to think that.

Fluorine's a tricky little bastard that's no good to anybody.
 

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