Question 1

What is Henry's Law?

Accepted Answer

Henry's Law states that the amount of gas dissolved in a liquid is directly proportional to the partial pressure of the gas above the liquid. Mathematically: C = k_H × P, where k_H is Henry's law constant.

Question 2

Why does soda go flat?

Accepted Answer

Soda is carbonated under high CO₂ pressure. When you open the bottle, the pressure drops, and by Henry's Law, the CO₂ solubility decreases, causing the gas to escape as bubbles.

Question 3

Does temperature affect Henry's Law constant?

Accepted Answer

Yes. Henry's law constant generally decreases with increasing temperature, meaning gases become less soluble in warmer liquids. This is why warm soda goes flat faster than cold soda.

Question 4

When does Henry's Law fail?

Accepted Answer

Henry's Law fails at very high pressures, for gases that react with the solvent (like HCl in water), and for gases at high concentrations. It works best for dilute solutions of gases that do not react with the solvent.

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