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[" For "H_(3)PO_(4),H_(3)PO_(4)rightleftharpoons H_(2)PO_(4)^(-)+H^(+)(K_(1))],[H_(2)PO_(4)^(-)rightleftharpoons HPO_(4)^(-)+H^(+)(K_(2))],[HPO_(4)^(2-)rightleftharpoons PO_(4)^(3-)+H^(+)(K_(3))" Then "]

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For H_(3)PO_(4) , H_(3)PO_(4) rarr H_(2)PO_(4)^(-)+H^(+)(K_(1)), H_(2)PO_(4)^- rarr HPO_(4)^(-)+H^(+) (K_2), HPO_(4)^(2-) rarr PO_(4)^(3-) + H^(+) (K_(3)) then

For H_(3)PO_(4) , H_(3)PO_(4) hArr H_(2)PO_(4)^(-) + H^(+) (K_(1)) H_(2)PO_(4)^(-) hArr HPO_(4)^(2-) + H^(+) (K_(2)) HPO_(4)^(2-) hArr PO_(4)^(3-) + H^(+) (K_(3)) then

For H_(3)PO_(4+) H_(3)PO_(4) rarr H_(2)PO_(4)^(-)+H^(+)(K_(1))H_(2)PO_(4) rarr HPO_(4)^(-)+H^(+) (K), HPO_(4)^(2) rarr PO_(4)^(3-) + H^(+) (K_(3)) then

The conjugate base of H_(2)PO_(4)^(-) is : a) H_(3)PO_(4) b) H_(2)PO_(4)^(-) c) HPO_(4)^(2-) d) PO_(4)^(3-)

H_(3)PO_(4)hArr H^(o+) +H_(2)PO_(4)^(Theta), K_(a_(1)) : H_(2)PO_(4)^(Theta) hArr H^(o+) +HPO_(4)^(2-),' K_(a_(2)) : HPO_(4)^(2-) hArr H^(o+) + PO_(4)^(3-), K_(a_(3)): Mark out the incorrect statements:

H_(3)PO_(4)hArr H^(o+) +H_(2)PO_(4)^(Theta), K_(a_(1)) : H_(2)PO_(4)^(Theta) hArr H^(o+) +HPO_(4)^(2-),' K_(a_(2)) : HPO_(4)^(2-) hArr H^(o+) + PO_(4)^(3-), K_(a_(3)): Mark out the incorrect statements: