if this could be explained to me better, that would be great! thanks Model 2: lo

Question

if this could be explained to me better, that would be great! thanks

Model 2: lons are Potential Acids or Bases. All anions are potential bases Cl"(aq) + H20(1) HC1(aq) + OHtaq) NO2-(aq) H2O(1) OHTaq) + HNO2(aq) + All cations are potential acids: NH4+(aq) + H20(1) NHy(aq) + H30.(w) Additional things to remember . Any molecule or ion which contains H is a potential acid . It is possible for a given che It is possible for a given chemical species to be a potential acid and a potential base Critical Thinking Questions 7. Indicate which of the following are potential acids, potential bases, or both (potential acid and potential base). a) Al b) CH,NH, c HPO, d) F e) NH f) H2O

Explanation / Answer

7)

(a) Al+3 is an acid. according to lewis theory all cations are electron pair acceptor . so it is acid.

Al+3 in water gives H+ ion also . so it is acid

Al+3 + 3 H2O ----------------------> Al(OH)3 + 3H+

(b) CH3NH3+ is an acid it gives H+ ion in the ionisation

CH3NH3+   + H2O ----------------------> CH3NH2 + H3O+

(c) HPO4-2   is an acid . it gives H+ ion in the ionisation with water

HPO4-2   + H2O -----------------> PO4-3   + H3O+

(d) F- is a base . in the ionisation process it gives OH-

F-   + H2O -----------------> HF + OH-

(e) NH4+ is an acid in the ionisation it gives H+ ions

NH4+   + H2O ----------------> NH3 + H3O+

(f) H2O is both acid and base. that means amphoteric . which furnishes both H+ and OH- ions in the ionisation

H2O + H2O -------------------> H3O+ + OH-

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