<u><em>A byproduct of fossil fuel combustion, is the principal greenhouse gas contributing to global warming. However, other greenhouse gases including methane, nitrous oxide, and a number of industrial-process gases also are important contributors to climate change.</em></u>
HA ⇄ H⁺ + A⁻ so: and now: = 1.5 x 10⁻⁵ x is considered very small compared to 0.15 x² = 2.25 x 10⁻⁶ x = 1.5 x 10⁻³ So [H⁺] = 1.5 x 10⁻³ pH = - log [H⁺] = - log (1.5 x 10⁻³) = 2.83
![\frac{[H^+][A^-]}{[HA]} = 1.5 x 10^{-5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5BH%5E%2B%5D%5BA%5E-%5D%7D%7B%5BHA%5D%7D%20%3D%201.5%20x%2010%5E%7B-5%7D%20%20)
= 1.5 x 10⁻⁵