Estimate the pKa using Pauling's rules for the formation step of the following bases: 1) HPO42-....
Estimate the pKa using Pauling's rules for the formation step of the following bases: 1) HPO42-. 2) ClO3-. 3) SeO4-.
Homework Answers
According to Paulings Rule,
pKa = 8 - 5p , where p=no.of oxo groups
1]. HPO42- is conjugate base of H2PO4-,
Give them in form of (OH)qP(O)p
For H2PO4-,(OH)2P(O)2,no of oxo groups=2
pKa=8-(5×2)=-2
2].ClO3- is conjugate base of HClO3,
For HClO3=(OH)Cl(O)2,no of oxo groups=2
pKa=8-(5×2)=-2
3]. SeO42- is conjugate base of HSeO4-
For this,(OH)Se(O)3,no of oxo groups=3
pKa=8-(5×3)=-7
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Estimate the pKa using Pauling's rules for the formation step of
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