i) the pH of aqueous NH4NO3 is less than 7
is it because
NH4NO3
![right arrow :rarrow:](https://www.chemicalforums.com/Smileys/classic/rarrow.png)
NH4+ + NO3- (don't undergo salt hydrolysis)
NH4+ + H2O
![::equil::](https://www.chemicalforums.com/Smileys/classic/equilibrium.png)
NH3 + H3O+
.:. the solution is acidic, therefore it is less than 7
![Huh ???](https://www.chemicalforums.com/Smileys/classic/huh.gif)
ii)the pH at the end point in the titration of ethanoic acid (CH3COOH) with sodium hydroxide (NaOH) is greater than 7
is it because there is an excess of NaOH
whereby, NaOH
![right arrow :rarrow:](https://www.chemicalforums.com/Smileys/classic/rarrow.png)
Na+ +
OH-iii) the pH of 1*10^-3 M HF is not 3