Table 2.
Compound | Rate constant 1 [M–1s–1] | pKa2 | Concentration3 [mM] | τO34 [s] |
---|---|---|---|---|
H2S | 3 × 104 | 7.00 | 0.02–0.91 | 0.4–1.6 × 10–1 |
HS− | 3 × 109 | 7.00 | 0.1–2.2 | 0.2–3.4 × 10–6 |
NH3 | 2 × 101 | 9.25 | 0.7–5.3 | 0.9–6.9 × 101 |
4-methylphenol | 3 × 104 | 10.2 | 1 | 3 × 10–2 |
4-methylphenolate | ∼1 × 109 | 10.2 | 0.0005 | 2.3 × 10–4 |
Butanoate | <4 × 10–2 | 4.8 | 1.5–9.8 | 0.3–1.6 × 104 |
pKa-values for corresponding acids are shown;
Concentration [X] range based on measured sum of acid and base concentration, the pKa value and the measured pH (Table 1) in the six batches. The presented 4-methylphenol and 4-methylphenolate concentrations were the maximum in [21];
Ozone's lifetime upon reaction with the compound is calculated with Equation (1).