The Fully Hydrated Form of Sodium Sulfate Is the Decahydrate,Na₂SO₄

question 96

Multiple Choice

The fully hydrated form of sodium sulfate is the decahydrate,Na₂SO₄ • 10H₂O.When heated the hydrated salt loses water.How many water molecules are found per formula unit in a partially dehydrated sample of sodium sulfate with a formula mass of 197 amu (i.e.find n for Na₂SO₄ • nH₂O) ?

• A)3 waters.
• B)5 waters.
• C)7 waters.
• D)9 waters.
• E)4 waters.

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