Two glass vessels are placed in a room.
They both have the same volume of water in them.
The necks of vessel A and B are the same diameter and length.
The water level of B is higher than in A, as its bottom is slightly indented.
Some other substance (gaseous) is added to the room, and is evenly distributed. The substance is somewhat soluble in water.
Does the concentration of the substance in the water increase at the same rate for A and B?
Is the final concentration of the substance the same in A and B?