Identify whether each species functions as a Br$$nsted$-$Lowry acid or a Br$$nsted$-$Lowry base in this net ionic equation.

$HN{O}_2(aq{)}_{Brnsted-\text{L}\text{o}\text{w}\text{r}\text{y}}+HP{O}_4^{2-}{?}_{Brnsted-\text{L}\text{o}\text{w}\text{r}\text{y}},N{O}_2^{-}{?}_{Brnsted-\text{L}\text{o}\text{w}\text{r}\text{y}},+H_{2}P{O}_4^{-}{?}_{\text{B}\text{r}\text{o}\text{n}\text{s}\text{t}\text{e}\text{d}-\text{L}\text{o}\text{w}\text{r}\text{y}}$

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The formula for the conjugate of $HN{O}_2$ is

The formula for the conjugate $,$ of $HP{O}_4^{2-}$ is