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anonymous

  • 5 years ago

which among the given acids as lowest pka value: a) Cl-CH2-COOH b) Br-CH2COOH c) O2N-CH2COOH d) NC-CH2COOH

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  1. anonymous
    • 5 years ago
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    this is electron reducing effect. the one group with the highest E-WG will be the strongest acid hence lowest pka. to me cl<br and no2>nc an educated guess would say C because NO2 is a knows electron withdrawing group

  2. anonymous
    • 5 years ago
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    Acidity increases from left to right and from top to bottom on the periodic table. Thus, in order of increasing acidity and decreasing pKa values: NC-CO2COOH<O2N-CH2COOH<Cl-CH2-COOH<Br-CH2COOH. Br-CH2COOH has the lowest pKa value and is the strongest acid.

  3. anonymous
    • 5 years ago
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    the guy above me is incorrect, he is only thinking single atom attached to a proton(H atom) NO2>CN>br>cl its due to I- electron withdrawing effect, because of resonance and N has 2 oxygens pulling a dipole or feild shift towrds it with has less electron density around the O-H THATs why and that why for all of these

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