I'm reviewing for my AP Chem acid-base equilibrium test, and I'm working problems out of the book, I have a problem that asks: "Predict the products of the following acid-base reactions, and predict whether the equilibrium lies to the left or to the right of the equation. 

One of the problems is

$\ce{NO2-}+\ce{H2O}\rightarrow ???$

I thought it would be 

$\ce{NO2-}+\ce{H2O}\rightarrow\ce{HNO2}+\ce{OH-}$, but my textbook says that the correct products are $\ce{HNO3}$ and $\ce{OH-}$. What am I doing wrong here? The answer that they give doesn't even seem to balance.