The Henry's law constant for CO 2 (g) in water at 25 ∘ C is 29.4 bar⋅M - 1. Estimate the concentration of dissolved CO 2 (g) in a carbonated soft drink pressurized with 1.95 bar of CO 2 (g).

The concentration of CO₂ in the carbonated soft drink (at 25°C) is 57.3 M

Explanation:

The concentration of a gas (C) in a liquid depends on its partial pressure (P). The higher the partial pressure, the higher its concentration in the liquid. The mathematical expression is known as Henry's law.

C = k. P

where,

k is the Henry's constant

C = (29.4 bar⁻¹. M). 1.95 bar = 57.3 M