What are the conjugate acids for the following bases?

$($a$)H{C}_2{O}_4^{-}$

$($b$)S{O}_4^{2-}$

What are the conjugate bases of the following acids?:

$($a$)N{H}_{3}O{H}^{+}$

$($b$)HC{O}_3^{-}$

In each of the following acid$-$base reactions, identify the Bronsted acid and base on the left, and their

conjugate partners on the right:

$($a$)Te{O}_3^{2-}+H_{3}P{O}_{4}HTe{O}_3^{-}+H_{2}P{O}_4^{-}$

$($b$)HAs{O}_3^{2-}+HAs{O}_4^{2-}{H}_{2}As{O}_3^{-}+As{O}_4^{3-}$

$($c$)N_2{H}_5^{+}+N{H}_{3}N{H}_4^{+}+N_2{H}_4$