Exploring Molarity and Dilutions

What does molarity represent in a solution?

• The volume of the solvent

• The concentration of the solute

• The temperature of the solution

• The color of the solution

What unit is commonly used to express molarity?

• grams per liter

• liters per mole

• cubic meters

• moles per liter

How do you convert grams to moles for calculating molarity?

• Multiply by 1000

• Divide by the molar mass

• Divide by 1000

• Multiply by the molar mass

What is the molarity of a solution with 0.505 moles of solute in 2.5 liters of solution?

• 0.1 M

• 2.5 M

• 0.202 M

• 0.505 M

What is the first step in solving a molarity problem where the mass of the solute is given?

• Convert moles to liters

• Convert volume to moles

• Convert mass to moles

• Convert mass to volume

What is the purpose of the dilution equation M1V1 = M2V2?

• To calculate the volume of the solvent

• To determine the final concentration after dilution

• To find the color intensity of the solution

• To measure the temperature change during dilution

If you start with 750 mL of a 0.5 M solution and 150 mL evaporates, what is the new molarity?

• 0.75 M

• 0.5 M

• 0.375 M

• 0.625 M

How many milliliters of a 6 M solution are needed to prepare 800 mL of a 0.5 M solution?

• 200 mL

• 100 mL

• 150 mL

• 66.67 mL

What happens to the molarity of a solution if the volume decreases while the amount of solute remains the same?

• It becomes zero

• It increases

• It remains the same

• It decreases

What must be true about the units of volume in the dilution equation?

• They can be in any units, but must match

• They must be in cubic meters

• They must be in milliliters

• They must be in liters