Write your answer to each of the following questions, on the blanks at the left.

Question

Write your answer to each of the following questions, on the blanks at the left. Consider HNO_2 Its conjugate base is _______. HNO_2 is a _______ acid (strong or weak). In the reaction between HNO_2 and HCN: HNO_2 (aq) + CN^- (aq) Equilibrium HCN (aq) + NO_2^- (aq) K = 1 times 10^6. The predominant species after the reaction reaches equilibrium are _______. (Write both species.) When HNO_2 is titrated with NaoH to the equivalence point, the pH of the resulting solution is _______ seven. (greater than, less than, equal to).

Explanation / Answer

1) NO2- is a conjugate base of HNO2

2) Weak acid (as dissociation is less)

3) HCN and NO2- (As the equilibrium constant is greater than 1)

4) Its greater than 7.( because the strength of the base is more than the strength of the acid)

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