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pKa of H2PO4- is = 7.21
According to Henderson's Equation ,
pH = pKa + log ( [salt] /[acid])
= pKa + log ( [Na2HPO4] / [ KH2PO4 ] )
= 7.21 + log ( 0.135 / 0.185 )
= 7.21 - 0.14
= 7.07
Solution
pKa of H2PO4- is = 7.21
According to Henderson's Equation ,
pH = pKa + log ( [salt] /[acid])
= pKa + log ( [Na2HPO4] / [ KH2PO4 ] )
= 7.21 + log ( 0.135 / 0.185 )
= 7.21 - 0.14
= 7.07

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pKa of H2PO4- is = 7.21According to Hendersons Equation ,pH = .pdf

  • 1. pKa of H2PO4- is = 7.21 According to Henderson's Equation , pH = pKa + log ( [salt] /[acid]) = pKa + log ( [Na2HPO4] / [ KH2PO4 ] ) = 7.21 + log ( 0.135 / 0.185 ) = 7.21 - 0.14 = 7.07 Solution pKa of H2PO4- is = 7.21 According to Henderson's Equation , pH = pKa + log ( [salt] /[acid]) = pKa + log ( [Na2HPO4] / [ KH2PO4 ] ) = 7.21 + log ( 0.135 / 0.185 ) = 7.21 - 0.14 = 7.07