Chapter 10.8, Problem 10.58PP

Consider the buffer system of nitrous acid, HNO₂, and its salt, NaNO₂. HNO₂(aq) + H₂0(1) H₃O(aq) + NO₂(aq)

a. The purpose of this buffer system is to:
1. maintain (HNO₂}
2. maintain [NO₂ J
3. maintain pH

b. The weak acid is needed to:
1. provide the conjugate base
2. neutralize added OW
3. provide the conjugate acid

c. If H₃O is added, it is neutralized by:
1. the salt
2. H₂0
3.0H -

d. When OH is added, the equilibrium shifts in the direction of the:
1. reactants
2. products
3. does not change