Molar Mass of Barium Phosphate

This video tutorial explains how to calculate the molar mass of barium phosphate (Ba3(PO4)2). It begins by identifying the atomic masses of barium, phosphorus, and oxygen from the periodic table. The tutorial then demonstrates how to calculate the molar mass of the phosphate ion and combines it with the mass of barium to find the total molar mass of barium phosphate, which is 601.93 grams per mole. The video concludes with a note on potential variations in molar mass calculations due to differences in periodic table data.

What is the first step in calculating the molar mass of barium phosphate?

• Identify the number of oxygen atoms

• Find barium on the periodic table

• Multiply the molar mass of phosphate by two

• Calculate the molar mass of phosphorus

How many barium atoms are present in barium phosphate?

• Two

• One

• Four

• Three

What is the molar mass of phosphorus used in the calculation?

• 601.93 grams per mole

• 16.00 grams per mole

• 30.97 grams per mole

• 137.33 grams per mole

How many oxygen atoms are considered in the calculation of the phosphate ion?

• Three

• Five

• Two

• Four

Why is the phosphate ion's molar mass multiplied by two?

• Because there are two barium atoms

• Because there are two phosphate ions

• To account for the molar mass of oxygen

• To match the molar mass of barium

What is the final calculated molar mass of barium phosphate?

• 16.00 grams per mole

• 601.93 grams per mole

• 30.97 grams per mole

• 137.33 grams per mole

What could cause a slight variation in the calculated molar mass?

• Miscounting the number of phosphate ions

• Different periodic tables with varying decimal places

• Incorrect number of barium atoms

• Using the wrong molar mass for oxygen

What is the significance of the units 'grams per mole' in the context of molar mass?

• It measures the density of the substance

• It shows the volume of the substance

• It represents the weight of one mole of a substance

• It indicates the number of atoms in a molecule