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# Theory of acids and bases

## pH of acids

### Exercise 21

Write the equation of the equilibrium hydrolysis of hydrazoic acid!

a) $HN_3$ $+$ $OH^-$ $N_3^-$ $+$ $H_2O$ b) $HN_3$ $+$ $H_2O$ $H_3O^+$ $+$ $N_3^-$ c) $HN_3$ $+$ $H_3O^+$ $H_2N_3^+$ $+$ $H_2O$ d) $HN_3$ $+$ $2H_2O$ $H_2N_3O$ $+$ $H_3O^+$

Here is the correct answer b): $HN_3$ $+$ $H_2O$ $H_3O^+$ $+$ $N_3^-$