Molarity Calculations: Concentration, Moles, and Volume

The video tutorial covers calculations related to molarity, focusing on three main problems. The first problem involves calculating the concentration of a sucrose solution given its mass and volume. The second problem requires determining the mass of sucrose in a solution with a known molarity and volume. The third problem involves finding the volume of a solution when given the mass of sucrose and the molarity. The tutorial emphasizes converting between grams and moles and using the formula for molarity, which is moles per liter.

What is the molar mass of sucrose used in the calculations?

• 342.3 grams/mole

• 320 grams/mole

• 300 grams/mole

• 350 grams/mole

How many moles of sucrose are present in 50.0 grams?

• 0.146 moles

• 0.150 moles

• 0.160 moles

• 0.140 moles

What is the concentration of the sucrose solution when 50.0 grams are dissolved in 210 milliliters of water?

• 0.500 M

• 0.750 M

• 0.600 M

• 0.696 M

What is the molar mass of sucrose?

• 345 grams/mole

• 350 grams/mole

• 340 grams/mole

• 342.3 grams/mole

How many grams of sucrose are in 750 milliliters of a 0.250 M solution?

• 75 grams

• 64.4 grams

• 60 grams

• 70 grams

How many moles are in 750 mL of a 0.250 M sucrose solution?

• 0.190 moles

• 0.180 moles

• 0.200 moles

• 0.188 moles

What is the volume of a solution if 10.0 grams of sucrose result in a 2.3 M solution?

• 10 milliliters

• 15 milliliters

• 20 milliliters

• 12.7 milliliters

What is the molarity of a solution when 10 grams of sucrose are dissolved to make a 12.7 mL solution?

• 2.5 M

• 2.0 M

• 2.3 M

• 1.8 M

How many moles of sucrose are in 10 grams?

• 0.0300 moles

• 0.0292 moles

• 0.0350 moles

• 0.0250 moles

What is the final concentration of a solution if 0.0292 moles of sucrose are dissolved to make 12.7 mL of solution?

• 2.3 M

• 2.5 M

• 2.0 M

• 2.1 M