Molar Mass of Calcium Chloride Dihydrate

This video tutorial explains how to calculate the molar mass of calcium chloride dihydrate (CaCl2H2O). It begins by finding the molar mass of calcium chloride using atomic masses from the periodic table, then calculates the molar mass of two water molecules. The tutorial combines these values to find the total molar mass of the compound, emphasizing the importance of rounding and noting that results may vary slightly based on the number of decimal points used.

What is the first step in calculating the molar mass of calcium chloride dihydrate?

• Calculate the mass of hydrogen

• Add the masses of all components

• Find the molar mass of calcium chloride

• Find the molar mass of water

How many chlorine atoms are present in calcium chloride?

• One

• Four

• Two

• Three

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

• 1.01

• 16.00

• 40.08

• 35.45

How many water molecules are considered in the calculation?

• One

• Three

• Two

• Four

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

• 1.01

• 16.00

• 40.08

• 35.45

What is the total molar mass of calcium chloride dihydrate?

• 110.98 grams per mole

• 147.02 grams per mole

• 36.04 grams per mole

• 40.08 grams per mole

Why might your calculated molar mass differ slightly from the video?

• Different periodic table versions

• Incorrect calculation

• Different chemical formula

• Using a different calculator

What is the significance of the dot in the chemical formula CaCl2·2H2O?

• Shows the presence of water molecules

• Separates calcium and chlorine

• Represents a phase change

• Indicates a chemical reaction