Due to a highway accident, 150 L of concentrated hydrochloric acid (12.0 M)is released into a lake containing 5.0 × 10⁵ m³ of water.If the pH of this lake was 7.0 prior to the accident, what is the pH of the lake following the accident?

Question

Quizplus · Accepted Answer

The moles of HCl added are 1800 moles (150 L * 12.0 M). The concentration of H+ ions in the lake becomes 3.6 x 10^-3 M (1800 moles / 5.0 x 10^5 m^3). The pH is calculated as -log(3.6 x 10^-3), which is approximately 5.44.

Due to a Highway Accident, 150 L of Concentrated Hydrochloric