Consider the following equilibrium Thio is apicl physicaf an

Thio is apicl physicaf and hem 2. Consider the following equilibrium 1 S Baso4() Ba2 (a)+SO (aq), AH>0 In which direction will the equilibrium shift if a. H2SO4 is added? Why? b. BaCl2 is added? Why\'? c. NaCl is added? Why? d. Heat is added? Why? trous acid, HNO2, a weak ac 3. Consider the following equilibrium for ni HNO2 (aq) + H20(1)HjO+ (aq) + NO2-(aq) In which direction will the equilibrium shift if a. NaOH is added? b. NaNO2 is added?

Solution

2)   a) shift to left (reactants side )

the reason is that on additon of H2SO4 there will be SO4-2 ion in common both . due to comon ion on product side the reaction will shift to backward direction

b) shift to left (reactants side )

here also same reason . common ion Ba+2 is on product side . so shifts to left

c)   NaCl added shift to right becuase Na+ react with SO4-2 and Cl- react with Ba+2 so product concentration decreases and the reaction shifts to forward direction

2Na+   + SO4-2 --------------> Na2SO4

Ba+2 + 2Cl- ----------------> BaCl2

d) forward reaction is endothermic so higher temperatures are fovor forward direction . so

heat added the reaction shifts to forward direction

3)

a) NaOH added shifts to right forward direction due to HNO2 concentration will decreases

HNO2 + NaOH -------------> NaNO2 + H2O

b) if NaNO2 is added the reaction shifts to backward direction (left) due to common ion on products side