calculate-the-ph-of-i-0-300-m-and-ii-0-030-m-hno2-solution-in-which-case-do-you-

Question

Calculate the pH of i) 0.300 M and ii) 0.030 M HNO₂ solution. In which case do you have to use the quadratic formula? The K_a of HNO₂ is 4.0 × 10^–4.

Accepted Answer

i) pH = 1.96
ii) pH = 2.49
Case ii) requires the quadratic formula.

Answer

i) pH = 2.26
ii) pH = 1.92
Case i) requires the quadratic formula.

Answer

i) pH = 1.42
ii) pH = 2.18
Both i) and ii) requires the quadratic formula.

Answer

i) pH = 2.31
ii) pH = 1.19
Neither requires the quadratic formula.