Hydration and Crystallization of Salts

Chemistry ⇒ Acids, Bases, and Salts

Hydration and Crystallization of Salts starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Hydration and Crystallization of Salts. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 12

Describe the difference between efflorescent, deliquescent, and hygroscopic substances.

Describe the effect of humidity on efflorescent and deliquescent salts.

Describe the steps involved in the laboratory preparation of hydrated crystals of copper(II) sulfate.

Describe what happens when hydrated copper(II) sulfate is heated.

Explain the process of crystallization in the preparation of hydrated salts.

A hydrated salt has the formula MgSO₄·xH₂O. If 2.46 g of the salt loses 1.08 g of water on heating, calculate the value of x. (MgSO₄ = 120 g/mol, H₂O = 18 g/mol)

A sample of hydrated sodium carbonate (Na₂CO₃·xH₂O) weighs 10 g. After heating, the residue weighs 3.8 g. Calculate the value of x. (Na=23, C=12, O=16, H=1)

A student prepares a saturated solution of a hydrated salt at 60°C and allows it to cool slowly to 25°C. Explain why crystals form and describe the role of temperature in the crystallization process.

Which of the following is a trihydrate? (1) FeSO₄·7H₂O (2) AlCl₃·6H₂O (3) Na₂CO₃·3H₂O (4) MgSO₄·7H₂O

Which of the following is an example of a hydrated salt? (1) Sodium chloride (2) Copper(II) sulfate pentahydrate (3) Potassium nitrate (4) Calcium oxide

Which of the following is NOT a property of hydrated salts? (1) They contain water of crystallization (2) They are always colored (3) They can lose water on heating (4) Their formula shows the number of water molecules

Which of the following is the correct formula for washing soda? (1) Na₂CO₃·10H₂O (2) Na₂CO₃·5H₂O (3) Na₂SO₄·10H₂O (4) NaCl·2H₂O

Fill in the blank: The blue color of copper(II) sulfate crystals is due to the presence of _________.

Fill in the blank: The chemical formula for gypsum is CaSO₄·2H₂O, where 2H₂O represents the _________.

Fill in the blank: The formula Na₂SO₄·10H₂O represents ________ sodium sulfate.

Fill in the blank: The green color of hydrated iron(II) sulfate is due to the presence of _________.

True or False: All salts are capable of forming hydrates.

True or False: Anhydrous salts can absorb water to become hydrated salts.

True or False: Magnesium chloride is a deliquescent salt.

True or False: The color of hydrated salts is always the same as their anhydrous form.