Quiz on Molarity and Solutions

What does "M" stand for in Model 2?

• Molarity

• Molecule

• Mass

Which type of solution (dilute or concentrated) will have a larger molarity value?

• Dilute

• Concentrated

• Both have equal values

Calculate the ratio using data from Model 2 if given values are: Solution A: 0.5 moles/1 liter; Solution B: 1 mole/0.5 liter. What are their respective ratios?

• Solution A = 0.5 M; Solution B = 2 M

• Solution A = 1 M; Solution B = 1 M

• Solution A = 0.25 M; Solution B = 4 M

Compare and contrast between dilute and concentrated solutions based on their molarities.

• Dilute solutions have lower molarity, concentrated solutions have higher molarity.

• Dilute solutions have higher molarity, concentrated solutions have lower molarity.

• Both have the same molarity.

Explain how beaker #5, with more moles of glucose, can have the same molarity as beaker #4.

• Beaker #5 has a larger volume of solution.

• Beaker #5 has a smaller volume of solution.

• Beaker #5 has the same volume of solution.

Write a mathematical equation to show how the molarity of a solution is calculated.

• Molarity = moles of solute / liters of solution

• Molarity = liters of solution / moles of solute

• Molarity = moles of solute * liters of solution

List the beaker numbers for the solutions in Model 2 that are considered to be "concentrated."

• Beakers 1 and 2

• Beakers 3 and 4

• Beakers 5 and 6

Can molarity be determined by knowing either the number of moles alone or volume alone? Explain why or why not.

• No, because both the number of moles and the volume are needed to calculate molarity.

• Yes, because the number of moles is sufficient.

• Yes, because the volume is sufficient.

Use the data in Model 2 to calculate the ratio of moles of solute to liters of solution for each solution.

• Solution A = 0.5 M; Solution B = 1 M

• Solution A = 1 M; Solution B = 2 M

• Solution A = 0.25 M; Solution B = 0.75 M

Consider beakers 3-5 in Model 2. Circle the answer below for the quantity that is the same in all beakers that contain 3 M solutions.

• Number of moles

• Volume of solution

• Ratio of moles of solute to liters of solution