Practice Problem: Molarity Calculations

The video tutorial covers three molarity problems: calculating concentration from mass and volume, finding mass from concentration and volume, and determining volume from mass and concentration. It provides step-by-step solutions and emphasizes the importance of converting units and using the formula for molarity, which is moles per liter.

What is the formula for calculating molarity?

• Grams per liter

• Liters per mole

• Moles per liter

• Moles per gram

How many moles of sucrose are present in 50 grams if the molar mass is 342.3 g/mol?

• 0.365 moles

• 0.146 moles

• 0.073 moles

• 0.292 moles

What is the concentration of a solution containing 0.146 moles of sucrose in 0.210 liters?

• 0.696 M

• 0.348 M

• 0.292 M

• 0.146 M

How much sucrose is in 750 mL of a 0.250 M solution?

• 16.1 grams

• 32.2 grams

• 64.4 grams

• 128.8 grams

What is the volume of a solution if 10 grams of sucrose are dissolved to make a 2.3 M solution?

• 50.8 mL

• 6.35 mL

• 25.4 mL

• 12.7 mL