Understanding Solutions and Molarity

What is the definition of molarity?

• The number of moles of solute per liter of solvent

• The number of grams of solute per liter of solvent

• The number of moles of solvent per liter of solute

• The number of grams of solvent per liter of solution

Tags

NGSS.HS-PS1-5

Calculate the molarity of a solution containing 2 moles of solute in 4 liters of solution.

• 0.5 M

• 1 M

• 2 M

• 4 M

Match the following descriptions with the correct term.

• Solute

• A substance that evaporates from a solution

• Solvent

• A substance that forms the bulk of a solution

• Liquid

• A substance that dissolves in a solvent

• Volatile component

• A substance that is always a liquid

Identify the solvent in a saltwater solution.

• Salt

• Water

• Both salt and water

• Neither salt nor water

What is the difference between a concentrated and a diluted solution?

• A concentrated solution has more solute than a diluted solution

• A diluted solution has more solute than a concentrated solution

• Both have the same amount of solute

• A concentrated solution has less solvent than a diluted solution

Tags

NGSS.HS-PS1-5

If you have a 1 M solution and you dilute it to twice its volume, what is the new molarity?

• 0.25 M

• 0.5 M

• 1 M

• 2 M

Which of the following is an example of a solute in a sugar-water solution?

• Sugar

• Water

• Both sugar and water

• Neither sugar nor water

What is the molarity of a solution made by dissolving 5 moles of solute in 10 liters of solution?

• 0.5 M

• 1 M

• 2 M

• 5 M

Which of the following statements is true about solvents?

• Solvents are always liquids

• Solvents dissolve solutes

• Solvents are always solids

• Solvents are always gases

If a solution has a molarity of 3 M, there are (a)   moles of solute in 2 liters of this solution.

• 1.5 moles
• 3 moles
• 6 moles
• 9 moles