Hydration and Water of Crystallization Calculations

Chemistry ⇒ Stoichiometry and Chemical Calculations

Hydration and Water of Crystallization Calculations starts at 10 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Hydration and Water of Crystallization Calculations. 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.

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Describe how you would experimentally determine the percentage of water in a sample of hydrated salt.

Describe the steps involved in determining the formula of a hydrated salt experimentally.

Explain the difference between a hydrated and an anhydrous salt.

Explain why hydrated salts often have different colors compared to their anhydrous forms.

A 2.50 g sample of hydrated cobalt(II) chloride, CoCl₂·xH₂O, is heated to give 1.25 g of anhydrous CoCl₂. Calculate the value of x.

A 3.22 g sample of hydrated sodium carbonate, Na₂CO₃·xH₂O, is heated to give 1.20 g of anhydrous Na₂CO₃. Calculate the value of x.

A 4.50 g sample of hydrated iron(II) sulfate, FeSO₄·xH₂O, is heated to give 2.45 g of anhydrous FeSO₄. Calculate the value of x.

A 5.00 g sample of hydrated barium chloride, BaCl₂·xH₂O, is heated to constant mass. The mass of the anhydrous salt is 4.26 g. Calculate the value of x.

Which of the following hydrated salts contains the highest percentage by mass of water? (1) MgSO₄·7H₂O (2) CuSO₄·5H₂O (3) Na₂CO₃·10H₂O (4) FeSO₄·7H₂O

Which of the following hydrated salts is used as a drying agent? (1) CuSO₄·5H₂O (2) Na₂CO₃·10H₂O (3) CaCl₂·2H₂O (4) MgSO₄·7H₂O

Which of the following is a correct statement about water of crystallization? (1) It is always present in multiples of 2. (2) It is essential for the crystal structure of some salts. (3) It can never be removed. (4) It is present only in organic compounds.

Which of the following is NOT a hydrated salt? (1) FeSO₄·7H₂O (2) Na₂CO₃·10H₂O (3) KCl (4) MgSO₄·7H₂O

Fill in the blank: The color change from blue to white when heating CuSO₄·5H₂O is due to the loss of _______.

Fill in the blank: The empirical formula of a hydrated salt is determined by finding the ratio of moles of _______ to moles of anhydrous salt.

Fill in the blank: The formula for hydrated zinc sulfate is ZnSO₄·_______H₂O.

Fill in the blank: The hydrated form of calcium sulfate is called _______.

True or False: The formula Na₂CO₃·10H₂O indicates that there are 10 water molecules for every formula unit of sodium carbonate.

True or False: The mass of a hydrated salt is always greater than the mass of its anhydrous form.

True or False: The number of water molecules in a hydrated salt can be a non-integer value.

True or False: The water of crystallization can affect the solubility of a salt.