U6 CP Chem % Comp, MM, Hydrates

Front

What is a hydrate?

Back

A hydrate is a compound that contains water molecules within its structure, typically represented as a solid with a specific number of water molecules attached to it.

Front

How do you name a hydrate?

Back

To name a hydrate, combine the name of the anhydrous compound with a prefix indicating the number of water molecules, followed by the word 'hydrate'. For example, NaCl * 5H2O is named sodium chloride pentahydrate.

Front

What is the molar mass of a compound?

Back

The molar mass of a compound is the mass of one mole of that compound, expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in the compound.

Front

How do you calculate the molar mass of CO2?

Back

To calculate the molar mass of CO2, add the molar mass of carbon (12 g/mol) and twice the molar mass of oxygen (16 g/mol). Thus, 12 + (2 x 16) = 44 g/mol.

Front

What is the molar mass of ammonium carbonate (NH4)2CO3?

Back

The molar mass of ammonium carbonate is calculated as follows: (2 x 14) + (8 x 1) + (12) + (3 x 16) = 96 g/mol.

Front

How do you find the molar mass of Na2SO4?

Back

To find the molar mass of Na2SO4, calculate: (2 x 23) + (32) + (4 x 16) = 142 g/mol.

Front

What is aluminum hydroxide's formula?

Back

The formula for aluminum hydroxide is Al(OH)3.

Front

How do you calculate the molar mass of aluminum hydroxide?

Back

To calculate the molar mass of aluminum hydroxide, sum the atomic masses: (27) + (3 x 16) + (3 x 1) = 78 g/mol.

Front

What is the significance of the prefix 'pentahydrate'?

Back

The prefix 'penta-' indicates that there are five water molecules associated with the compound.

Front

What is the difference between anhydrous and hydrated compounds?

Back

Anhydrous compounds do not contain water, while hydrated compounds have water molecules integrated into their structure.