Not only acids and bases dissociate, water dissociates too: and the equilibrium of this reaction is described by the equation. 1.7. However, in practice we use simplified version of this equation, called water ionization constant (sometimes called also water ion product) 1.4.
A lightning flash preceding its thunder by one second would be approximately 350 metres (0.22 mi) in distance; a delay of three seconds would indicate a distance of about one kilometer (0.62 mi) (3Ã340 m). A flash preceding thunder by five seconds would indicate a distance of approximately one mile (1.6 km) (5Ã340 m).
Because light and sound travel at different speeds, you can approximate the storm's distance by counting the interval between a flash of lightning and the associated sound of thunder. As a rough guide, every 5 second interval is equal to 1 mile (3 seconds is equal to 1 km) between you and the storm.