Solution and Molarity Basics

Which of the following solutions has a molarity of 2.0?

• 0.050 mole of solute in 0.0250 L of solution

• 2.0 moles of solute in 0.5000 L of solution

• 3.0 moles of solute in 1.5000 L of solution

• none of the above

Concentration of a solution is expressed in

• moles
• molar
• molar mass
• molarity

Tags

NGSS.HS-PS1-5

If I dissolve carbon dioxide in water, what is the solvent?

• Carbon Dioxide

• There is no solvent

• Oxygen

• Water

A solution is also known as a ________ mixture.

• heterogeneous

• homogeneous

• mixed

A 15.0 L solution of CH₃OH has a molarity of 3.0 M. How many moles of solute are dissolved in solution?

• 45 moles

• 5.0 moles

• 0.2 moles

What is the molarity of a solution made by adding 1.565 moles of Pb(NO₃ )₂ to enough water to make 500. mL of soution?

• 300. M

• 31.3 M

• 3.13 M

• 1.56 M

Calculate the mass percent of solution, if there is 100 g of sugar and 400 g of water

• 30

• 25

• 20

• 15

How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?

• 1074 mol
• 0.069 mol
• 1.07 mol
• 62.7 mol

Solutions are composed of __________ .

• salts and solutes
• solvents and salts
• solutes and alloys
• solutes and solvents

What are the units of molarity?

• $\frac{mol}{mL}$

• $\frac{L}{mol}$

• $\frac{mol}{L}$

• $\frac{mol}{kg}$

Tags

NGSS.HS-PS1-5