Boxes M and N contain equal numbers of water molecules
CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance
Problem
Boxes M and N contain equal numbers of water molecules, but Box M has twice the physical volume of Box N. Each box contains 8 particles of the same non-electrolyte solute.
Which statement about the relative concentrations of the two solutions is correct?
(a) The relative concentration cannot be determined without calculating molarity in molL−1 from additional numerical data.
(b) The solutions have identical concentration because they contain the same number of solute particles and the same amount of water.
(c) Box N is more concentrated because the same number of solute particles are dissolved in half the volume.
(d) Box M is more concentrated because its larger volume makes the molarity twice as large.