Hydrates/Empirical Formula Practice

Front

What is the empirical formula for a compound containing 36.95 g of mercury (Hg) and 13.05 g of chlorine (Cl)?

Back

HgCl₂

Front

Name the hydrate represented by NaCl * 5H₂O.

Back

sodium chloride pentahydrate

Front

What is an empirical formula?

Back

The simplest whole-number ratio of moles of elements in the compound.

Front

What is Na₂CO₃ · 10H₂O known as?

Back

sodium sulfate decahydrate

Front

What is the name of the ionic compound BeCl₂?

Back

beryllium chloride

Front

Define a hydrate.

Back

A compound that contains water molecules within its structure.

Front

What is the formula for calculating the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What does the term 'pentahydrate' indicate?

Back

A hydrate that contains five water molecules.

Front

How do you determine the empirical formula from a molecular formula?

Back

Divide the subscripts in the molecular formula by their greatest common divisor.

Front

What is the significance of the dot in a hydrate formula (e.g., NaCl · 5H₂O)?

Back

It indicates that the water molecules are associated with the ionic compound.