Related Questions
Which concentration term is independent of temperature?
Molarity
Molality
Normality
Formality
A binary liquid mixture of components A and B exhibits an azeotrope at a specific composition. Which of the following statements is ALWAYS true about this azeotropic mixture?
The composition of the vapor phase is identical to the composition of the liquid phase.
The boiling point of the azeotrope is the average of the boiling points of pure A and B.
The azeotrope can be separated into pure A and B by fractional distillation.
The azeotrope always shows a positive deviation from Raoult's Law.
If we dissolve 20g of NaOH in 200ml of water, what will be the mass percentage of NaOH in the solution (assuming the density of water is 1g/ml)?
9.09%
10%
11.11%
20%
What is the molarity of a solution containing 1 mole of solute in 500 mL of solution?
0.5 M
1 M
2 M
4 M
Which of the following properties of a substance is directly influenced by temperature?
Molarity of a solution
Molality of a solution
Rate of diffusion
Normality of a solution
In a solution containing 0.1 moles of a solute and 5 moles of solvent, what is the mole fraction of the solvent?
0.02
0.10
0.98
5.0
What is the mole fraction of the solute in a 1.00 m aqueous solution of glucose?
0.0177
0.0180
0.982
1.00
If 20 g of solute is dissolved in 80 g of solvent, what is the mass percentage of the solute?
20%
80%
25%
40%
Which of these is the correct formula for calculating molality?
Moles of solute / Liters of solution
Moles of solute / Kilograms of solvent
Grams of solute / Liters of solution
Grams of solute / Kilograms of solvent
A mixture of two volatile liquids A and B shows a negative deviation from Raoult's law. Which of the following statements is INCORRECT regarding this mixture?
The enthalpy of mixing is negative.
The volume of mixing is negative.
The boiling point of the mixture is lower than that predicted by Raoult's law.
The intermolecular forces between A and B are stronger than the A-A and B-B interactions.
