A highly acidic drip-stream flows out of an abandoned coal

Last updated: 7/5/2022

A highly acidic drip-stream flows out of an abandoned coal mine and changes the pH of a nearby pond from pH 6.9 to pH 3.9; this makes the hydronium ion concentration of the pond... Hydronium ion concentration is 3 times lower. Hydronium ion concentration is 1000 times lower. Hydronium ion concentration is 100 times higher. Hydronium ion concentration is 1000 times higher. Hydronium ion concentration is 3 times higher. Hydronium ion concentration is 10 times lower.