A colloidal solution of gold nanoparticles is prepared by reduction of . Which of the following methods is MOST EFFECTIVE for purifying this solution from excess reactants and small ionic byproducts?
Filtration
Centrifugation
Dialysis
Evaporation
Related Questions
How many moles of solute are present in a 2 molal solution containing 250g of solvent?
0.25 moles
0.5 moles
1 mole
2 moles
If 1 kg of solvent contains 2 moles of solute, what is the molality of the solution?
1 molal
2 molal
0.5 molal
4 molal
Which concentration term is independent of temperature?
Molarity
Molality
Normality
Formality
A 1 molal aqueous solution contains 0.5 moles of solute. What is the mass of the solvent (water) in kilograms?
0.5 kg
1 kg
2 kg
1.5 kg
A solution is prepared by dissolving 0.25 moles of glucose in 500g of water. What is the molality of the glucose solution?
0.25 molal
0.5 molal
1 molal
2 molal
What is the molality of a solution where the mole fraction of the solute is 0.02 and the solvent is water?
1.13 m
0.02 m
0.98 m
55.51 m
A 0.5 molal aqueous solution of urea () is prepared. What is the mole fraction of urea?
0.0089
0.0090
0.50
0.99
Which of the following concentration terms is NOT affected by temperature?
Molality
Molarity
Normality
Formality
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
Which of the following describes a 0.5 molal solution?
0.5 moles of solute in 1 kg of solvent
1 mole of solute in 0.5 kg of solvent
0.5 moles of solute in 0.5 kg of solvent
1 mole of solute in 1 kg of solvent
