Electronegativity vs electrochemical series

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SUMMARY

The discussion centers on the apparent contradiction between the electrochemical series and Pauling electronegativity values. Carbon is positioned higher in the electrochemical series than hydrogen, indicating it is more electropositive, yet its Pauling electronegativity value is 2.55, compared to hydrogen's 2.2. This discrepancy highlights the differences between the two scales, as they measure distinct properties. Additionally, the discussion notes that lithium, despite having a greater standard electrode potential (Eo), is less reactive than potassium, further illustrating the complexities of these measurements.

PREREQUISITES
  • Understanding of electrochemical series and its significance
  • Familiarity with Pauling electronegativity scale
  • Knowledge of standard electrode potential (Eo) values
  • Basic concepts of chemical reactivity
NEXT STEPS
  • Research the differences between electrochemical series and electronegativity scales
  • Explore the implications of standard electrode potential (Eo) in chemical reactivity
  • Investigate the reactivity trends of alkali metals, focusing on lithium and potassium
  • Examine the factors influencing electronegativity and electropositivity in elements
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Chemistry students, educators, and professionals interested in understanding the nuances of chemical properties and reactivity, particularly in relation to the electrochemical series and electronegativity.

Miffymycat
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Carbon is higher in the electrochemical series than hydrogen, which indicates it is more electropositive, but Pauling values show carbon as more electronegative - 2.55 vs 2.2!?

Any reason / explanation for the apparent contradiction? Tried looking for an Eo value for C (should be more negative then -0.76V) but no joy ...

Come to that, Li is less reactive than K, but has a greater Eo ...

Thanks in advance for any replies
 
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Miffymycat said:
Carbon is higher in the electrochemical series than hydrogen, which indicates it is more electropositive

This is comparing apples and oranges. There exist some slight correlation, but these are separate scales.
 

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