DHT8 Molarity Quiz

Your friend made you a hot drink of Nescafe 3 in 1 (coffee, milk powder, sugar). Which of the following is the solute?

• Coffee

• Hot water

• Milk Powder

• Sugar

What is the definition of molarity?

• Mass of solute dissolved per unit volume

• Number of moles of solute dissolved per unit volume

• Mass of solute per mass of solvent

• Moles of solute per mass of solvent

What is the unit for molarity?

• M

• mol L^-1

• mol dm^-3

• g L^-1

What is the formula for molarity?

• Molarity = Mass of solute / Volume of solution

• Molarity = Mass of solute / Mass of solvent

• Molarity = Moles of solute / Volume of solution

• Molarity = Moles of solute / Mass of solvent

Calculate the molarity of 10.6 g of Na₂CO₃ in 100 mL solution. [MW = 106 gmol^-1]

• Molarity = 0.106 M

• Molarity = 1.0 M

• Molarity = 0.001 M

• Molarity = 106 M

Calculate the number of moles of SO₃^2- ions in 0.5 M of Fe₂(SO₄)₃. Given the volume of solution is 1.0 L.

• 2.0 mol

• 1.0 mol

• 0.5 mol

• 1.5 mol