Advertisements
Advertisements
Question
Concentration terms such as mass percentage, ppm, mole fraction and molality are independent of temperature, however molarity is a function of temperature. Explain.
Advertisements
Solution
Molarity of a solution is a weight by volume relationship to represent its strength and defined as the number of moles of solute dissolved in one litre of solution. Since volume depends on temperature and undergoes a changes with change in temperature, the molarity will also change with change in temperature. On the other hand, the other concentration terms such as mass percentage, ppm, mole fraction and molality are based uopn mass by mass relationship of solute and solvent present in a binary solution. Mass does not change with change in tempetature, as a result these concentration terms remain unchanged with variation of temperature. According to the defination of all these terms, mass of the solvent used for making the solution is related to the mass of solute.
APPEARS IN
RELATED QUESTIONS
What role does the molecular interaction play in a solution of alcohol and water?
Suggest the most important type of intermolecular attractive interaction in the following pair.
acetonitrile (CH3CN) and acetone (C3H6O)
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
Ideal solutions obey ………. law and they …………. form azeotropic mixtures.
(Henry’s, aldol condensation, absence, do not, ohm, Raoult’s, increases, common ion effect, easily, three, solubility product, ohm-1, two, four, ohm-1, cm2, Cannizzaro, ohm-1 cm-1, zero, decreases, presence)
The molality of a solution containing 1.8 g of glucose dissolved in 250 g of water is
For ideal solution the enthalpy of mixing of the pure components to form the solution is ____________.
The rate at which a solid dissolves in liquid does not depend on ____________.
Which of the following condition is not satisfied by an ideal solution?
Which of the following is an example of a solid solution?
What is “semi permeable membrane”?
Assertion: Molarity of a solution in liquid state changes with temperature.
Reason: The volume of a solution changes with change in temperature.
Upon increase in pressure for dissociation N2O4 into NO2, equilibrium shift towards
Dissociation constant and molar conductance of an acetic acid solution are 1.78 × 10–5 mol L–1 and 48.15 S cm–2 mol–1 respectively. The conductivity of the solution is (considering molar conductance at infinite dilution is 390.5 S cm–2 mol–1)
How many times more hydrogen ions in a solution with a pH of 3 than in a solution with a pH of 6
The pH of a solution of hydrochloric acid is 1.5. Calculate the concentration of the acid.
Which of the following gave the idea of a nucleus of the atom?
Lowering of vapour pressure of an aqueous solution of a non-volatile, non-electrolyte 1 molal aqueous solution at 100°C is ______.
Assertion (A): The enthalpy of mixing Δmix H is equal to zero for an ideal solution.
Reason (R): For an ideal solution the interaction between solute and solvent molecules is stronger than the interactions between solute-solute or solvent-solvent molecules.
