Chemical Properties of Calcium Sulfate

The video tutorial explains how to calculate the molar mass of calcium sulfate dihydrate (CaSO4.2H2O). It begins by calculating the molar mass of calcium sulfate using the atomic masses of calcium, sulfur, and oxygen from the periodic table. Then, it calculates the molar mass of the two water molecules, considering the atomic masses of hydrogen and oxygen. Finally, the video adds these values to find the total molar mass of calcium sulfate dihydrate, which is 172.17 grams per mole.

What is the chemical formula for calcium sulfate dihydrate?

• CaSO4.H2O

• CaSO4.2H2O

• Ca2SO4.2H2O

• CaSO4

What is the atomic mass of calcium used in the calculation?

• 40.08 grams per mole

• 32.07 grams per mole

• 16.00 grams per mole

• 1.01 grams per mole

How many oxygen atoms are present in calcium sulfate?

• 2

• 5

• 3

• 4

What is the atomic mass of hydrogen used in the calculation?

• 32.07 grams per mole

• 1.01 grams per mole

• 40.08 grams per mole

• 16.00 grams per mole

How many water molecules are present in calcium sulfate dihydrate?

• 3

• 4

• 2

• 1

What is the total molar mass of calcium sulfate dihydrate?

• 150.17 grams per mole

• 180.17 grams per mole

• 160.17 grams per mole

• 172.17 grams per mole

If you have one mole of calcium sulfate dihydrate, how much does it weigh?

• 160.17 grams

• 150.17 grams

• 180.17 grams

• 172.17 grams