HORHHOHHHORROCROHHApproximate pKavalues(rounded to nearest 5)RNH3ROHH2OCH4RCH3NH3RCCHR2CCHH< 05NH4R2NH2R3NHRNH2R2NHRCOHO101525354550Element effect periodic trend(when acidic hydrogen is bonded to a different element): C N O FClBrIincreasingacidityincreasing basicityThis means that H2O will be a stronger acid than NH3which will be a stronger acid than CH4. Be careful when comparing acids and bases using this periodic trend to make sure that they have the same charge and hybridization! Example 1:You can’t compare NH4+and H2O and say that H2O is a stronger acid. You cancompare NH4+and H3O+and say that H3O+is a stronger acid. Example 2:You can’t compare OH- and NH3and say that NH
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This note was uploaded on 11/23/2010 for the course CHEMISTRY Chem 51A taught by Professor Dr.susanm.king during the Fall '10 term at UC Irvine.