Chemistry - Concentration Terms Question with Solution | TestHub
Match the items in List I with the corresponding properties/values in List II.
List I (Concentration Term/Scenario)List II (Properties/Mathematical Relations)
(P) Molarity (M) (1) Temperature independent
(Q) Molality (m) (2)
(R) Mole Fraction ( ) (3) Units are mol.
(S) Mass Percentage (w/w) (4) Depends on the density of the solution
(5)
(6) Changes with temperature
Select the correct matching set
Options:
Answer:
Solution:
P (Molarity):
It is defined as moles of solute per liter of solution. Since volume changes with temperature, Molarity is temperature-dependent (6). Its units are mol L⁻¹ (3). It also involves volume, thus it relates to density (4) when converting to mass-based terms.
Q (Molality):
It is defined as moles of solute per kg of solvent. Since mass does not change with temperature, it is temperature-independent (1). The conversion formula between $M$ and $m$ is exactly as shown in (2).
R (Mole Fraction):
This is a ratio of moles, making it temperature-independent (1). The relationship between mole fraction and molality is given by the formula in (5).
S (Mass Percentage):
This is a mass/mass ratio, making it temperature-independent (1).