Concentration and Molarity

Which of the following is the correct formula for calculating molarity?

• moles/liters of solution

• moles/kg of solvent

• # particles/Avogadro's #

• theoretical yield/actual yield

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

What is the molarity of 4 grams of sodium chloride in 3,800 mL of solution?

• 0.018 M

• 0.018 mol

• 1.052 M

• 1.052 mol

The concentration of a mixture can be increased in which of the following ways?

• Heating the mixture

• Adding more water “solvent”

• Adding more powder “solute”

• Stirring the mixture

Which solution is more concentrated?

• Solution 1

• Solution 2

• They have the same concentration

• I have no idea

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

• 30

• 25

• 20

• 15

A student is preparing solutions for a laboratory experiment by dissolving solid solutes in liquid solvents. Which action will increase the rate of solubility

• lowering the temperature of the solvent

• stirring the solute in the solution

• increasing the pressure on the solution

• increasing the particle size of the solute

The amount of solute actually dissolved in a given amount of solvent.

• dilution

• concentration

• saturated solution

• supersaturated mixture

When a solvent contains as much of the solute as it can hold, the solution is said to be

• supersaturated

• diluted

• saturated

• unsaturated

Which of the following would result in being able to dissolve a greater amount of solid in a solution?

• Lower the temperature.

• Decrease the pressure of the solution.

• Increase the pressure of the solution.

• Heat the solution.

Tags

NGSS.MS-PS1-4