Understanding Molarity

What is the primary advantage of using molarity over mass percent in chemistry?

• It is the standard method used by chemists.

• It requires less information to compute.

• It provides a more accurate measurement.

• It is easier to calculate.

How is molarity defined in terms of solute and solution?

• Grams of solute per liter of solution

• Moles of solute per gram of solution

• Grams of solute per mole of solution

• Moles of solute per liter of solution

In the example provided, what is the molarity of a solution with 2.5 moles of solute in 0.5 liters of solution?

• 1 M

• 0.5 M

• 5 M

• 2.5 M

Which formula can be derived from the molarity equation to find the number of moles?

• Moles = Molarity * Liters

• Moles = Molarity / Liters

• Moles = Liters / Molarity

• Moles = Liters * Molarity

If a solution has a molarity of 0.680 M and contains 2.55 moles of solute, what is the volume of the solution?

• 0.680 L

• 2.55 L

• 1.5 L

• 3.75 L

How many moles of solute are in a 25.5 L solution with a molarity of 1.35 x 10^-4 M?

• 3.44 x 10^-5 moles

• 3.44 x 10^-3 moles

• 3.44 x 10^-4 moles

• 3.44 x 10^-2 moles

What is the volume of a solution if it contains 6.5 moles of solute and has a molarity of 1.5 M?

• 4.33 L

• 6.5 L

• 1.5 L

• 3.25 L

To calculate molarity, why is it necessary to convert grams to moles?

• Because grams are not a standard unit in chemistry.

• Because grams do not account for volume.

• Because molarity is defined in terms of moles.

• Because moles are easier to measure.

In the advanced problem, what is the molarity of a solution with 70.5 g of Al2(SO4)3 in 345 mL of water?

• 0.345 M

• 0.680 M

• 0.206 M

• 0.597 M

What is the first step in solving a problem where grams of solute are given, but molarity is needed?

• Convert moles to grams.

• Convert liters to moles.

• Convert grams to moles.

• Convert grams to liters.