(i) Consider the oxidation of nitric oxide to form NO_(2) 2NO_((g))+O_(2(g)) to 2NO_(2(g)) (a) Express the rate of the reaction in terms of changes in the concentration of NO, O_(2) and NO_(2). (b) At a particular instant, when [O_(2)] is decreasing at 0.2mol L^(-1)s^(-1) at what rate is [NO_(2)] increasing at that instant? (ii) Classify the following as acid (or) base using Arrhenius concept 1. HNO_(3)"" 2.Ba(OH)_(2)""3. H_(3)PO_(4)"" 4. CH_(3)COOH

(i) Consider the oxidation of nitric oxide to form NO_(2) 2NO_((g))+O

1.	(i) Consider the oxidation of nitric oxide to form NO_(2) 2NO_((g))+O_(2(g)) to 2NO_(2(g)) (a) Express the rate of the reaction in terms of changes in the concentration of NO, O_(2) and NO_(2). (b) At a particular instant, when [O_(2)] is decreasing at 0.2mol L^(-1)s^(-1) at what rate is [NO_(2)] increasing at that instant? (ii) Classify the following as acid (or) base using Arrhenius concept 1. HNO_(3)"" 2.Ba(OH)_(2)""3. H_(3)PO_(4)"" 4. CH_(3)COOH
Answer» Solution :(i) (a) Rate `=(-1)/(2)(d[NO])/(dt)=(d[O_(2)])/(dt)=(1)/(2)(d[NO_(2)])/(dt)` (b) `(-d[O_(2)])/(dt)=(1)/(2)(d[NO_(2)])/(dt)` `(d[NO_(2)])/(dt)=2xx((-d[O_(2)])/(dt))=2xx0.2" MOL "L^(-1)s^(-1)=0.4" mol "L^(-1)s^(-1)` (ii) 1. `HNO_(3)` : Nitric acid, dissociates to give hydrogen ions in water. `therefore HNO_(3)` is acid. 2. `Ba(OH)_(2)` : BARIUM hydroxide, dissociates to give hydroxyl ions in water. `therefore Ba(OH)_(2)` is BASE. 3. `H_(3)PO_(4)` : Orthophosphoric acid, dissociates to give hydrogen ions in water. `therefore H_(3)PO_(4) ` is acid. 4. `CH_(3)COOH` : Acetic acid, dissociates to give hydrogen ions in water. `therefore CH_(3)COOH` is acid.