Home › AP Chemistry › Chemistry › Solutions and Colloids › Under Henry's law, halving the pressure of a gas…
Under Henry's law, halving the pressure of a gas above a liquid changes the dissolved quantity to:
ATwice the original
BFour times as much
CThe same amount
DHalf the original
Answer & Solution
Correct answer: D. Half the original
1. Henry's law is a direct proportion, so the arithmetic is simple.
2. The quantity of an ideal gas dissolving in a definite volume of liquid is directly proportional to pressure.
3. Direct proportion means the quantity scales with pressure by the same factor.
4. Halving the pressure therefore halves the dissolved quantity.
5. That is why a drink goes flat once its container is opened.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 11 'Solutions and Colloids', sections 11.1-11.5_
Related questions
Boiling point elevation and freezing point depression both arise because added solute chanAn emulsion may be prepared by shaking together or blending two liquids that are:In a colloid, the particulate component present in relatively minor amount is called the:Colloids are described as exhibiting properties intermediate between those of:The boiling point of a liquid is the temperature at which its vapor pressure equals:Diffusion-driven transfer of solvent molecules through a semipermeable membrane is:Solutions are described as freezing at temperatures that are, compared with pure liquids:Which four properties are listed as the colligative properties?